Miirym, Sentinel Wyrm
Astral Dragon
Primal Vigor

   Prerequisites

What do I need to start this combo?
Astral Dragon in hand.
Miirym and Primal Vigor on the battlefield.
6 available

   Steps

How does this combo work?
1
Cast Astral Dragon by paying 6.
2
Astral Dragon enters the battlefield, triggering itself and Miirym.
3
Resolve the Astral Dragon trigger, creating four token copies of Primal Vigor that are 3/3 Dragons in addition to their other types.
4
Resolve the Miirym trigger, creating a total of 32 Astral Dragon tokens.
5
The Astral Dragon tokens enter the battlefield, creating an extremely large number of Primal Vigor tokens that are 3/3 Dragons in addition to their other types.

   Results

What do I get from this combo?
Near-infinite creature tokens
Near-infinite ETB
Miirym, Sentinel Wyrm
1.9%inclusion478 decks25.3K decks
The Ur-Dragon
0.1%inclusion23 decks41.7K decks
Tiamat
0.1%inclusion9 decks10.6K decks
Ureni of the Unwritten
0.1%inclusion8 decks13.6K decks
Eshki, Temur's Roar
0.0%inclusion3 decks9.51K decks
Riku of Two Reflections
0.0%inclusion2 decks4.90K decks
The Tenth Doctor // Clara Oswald
0.1%inclusion1 decks978 decks
Flubs, the Fool
0.0%inclusion1 decks19.2K decks
Ureni, the Song Unending
0.1%inclusion1 decks1.96K decks
Progenitus
0.0%inclusion1 decks4.83K decks
Rashmi and Ragavan
0.0%inclusion1 decks4.40K decks
Yasova Dragonclaw
0.1%inclusion1 decks1.63K decks
New Cards
Chronicle of Victory
17%inclusion2 decks12 decks
16%synergy
White Lotus Tile
4.1%inclusion3 decks73 decks
3%synergy
Ran and Shaw
4.1%inclusion3 decks73 decks
3%synergy
The Walls of Ba Sing Se
3.0%inclusion2 decks67 decks
1%synergy
Secret Tunnel
2.9%inclusion2 decks69 decks
0%synergy
High Synergy Cards
Ganax, Astral Hunter
78%inclusion414 decks529 decks
76%synergy
Dragon Tempest
78%inclusion413 decks529 decks
75%synergy
Dragonspeaker Shaman
67%inclusion357 decks529 decks
65%synergy
Scourge of Valkas
67%inclusion354 decks529 decks
65%synergy
Lathliss, Dragon Queen
66%inclusion349 decks529 decks
63%synergy
Terror of the Peaks
63%inclusion332 decks529 decks
58%synergy
Old Gnawbone
61%inclusion324 decks529 decks
58%synergy
Doubling Season
66%inclusion350 decks529 decks
56%synergy
Parallel Lives
62%inclusion326 decks529 decks
55%synergy
Atarka, World Render
60%inclusion319 decks529 decks
55%synergy
Top Cards
Temur Ascendancy
66%inclusion347 decks529 decks
50%synergy
Dragonlord's Servant
56%inclusion298 decks529 decks
54%synergy
Garruk's Uprising
56%inclusion294 decks529 decks
39%synergy
Utvara Hellkite
53%inclusion283 decks529 decks
51%synergy
Panharmonicon
53%inclusion280 decks529 decks
49%synergy
Thrakkus the Butcher
53%inclusion278 decks529 decks
49%synergy
Cultivate
52%inclusion275 decks529 decks
9%synergy
Goldspan Dragon
51%inclusion272 decks529 decks
45%synergy
Roaming Throne
49%inclusion259 decks529 decks
42%synergy
Korlessa, Scale Singer
49%inclusion258 decks529 decks
47%synergy
Game Changers
Smothering Tithe
33%inclusion11 decks33 decks
12%synergy
Cyclonic Rift
31%inclusion162 decks529 decks
8%synergy
Worldly Tutor
27%inclusion142 decks529 decks
15%synergy
Rhystic Study
26%inclusion137 decks529 decks
2%synergy
Demonic Tutor
21%inclusion7 decks33 decks
2%synergy
Fierce Guardianship
21%inclusion111 decks529 decks
3%synergy
Vampiric Tutor
15%inclusion5 decks33 decks
0%synergy
Enlightened Tutor
15%inclusion5 decks33 decks
0%synergy
Ancient Tomb
11%inclusion57 decks529 decks
1%synergy
Mana Vault
5.1%inclusion27 decks529 decks
-1%synergy
Creatures
Ancient Gold Dragon
48%inclusion16 decks33 decks
47%synergy
Rith, Liberated Primeval
48%inclusion16 decks33 decks
45%synergy
Tiamat
48%inclusion16 decks33 decks
42%synergy
Savage Ventmaw
46%inclusion244 decks529 decks
41%synergy
Earthquake Dragon
46%inclusion243 decks529 decks
45%synergy
Sarkhan, Soul Aflame
46%inclusion241 decks529 decks
42%synergy
Ureni of the Unwritten
45%inclusion147 decks326 decks
40%synergy
Wrathful Red Dragon
45%inclusion238 decks529 decks
43%synergy
Ancient Copper Dragon
44%inclusion232 decks529 decks
40%synergy
Ancient Silver Dragon
42%inclusion224 decks529 decks
40%synergy
Adrix and Nev, Twincasters
41%inclusion219 decks529 decks
37%synergy
Scaled Nurturer
41%inclusion215 decks529 decks
40%synergy
Twinflame Tyrant
40%inclusion160 decks404 decks
36%synergy
Klauth, Unrivaled Ancient
38%inclusion201 decks529 decks
35%synergy
Lozhan, Dragons' Legacy
37%inclusion194 decks529 decks
35%synergy
Ancient Brass Dragon
36%inclusion12 decks33 decks
34%synergy
Dragonlord Dromoka
36%inclusion12 decks33 decks
33%synergy
Morophon, the Boundless
33%inclusion11 decks33 decks
19%synergy
Drakuseth, Maw of Flames
31%inclusion165 decks529 decks
28%synergy
Spark Double
31%inclusion163 decks529 decks
24%synergy
Balefire Dragon
29%inclusion154 decks529 decks
27%synergy
Hellkite Charger
29%inclusion152 decks529 decks
27%synergy
Ramos, Dragon Engine
27%inclusion9 decks33 decks
21%synergy
Ancient Bronze Dragon
26%inclusion139 decks529 decks
25%synergy
Hellkite Tyrant
25%inclusion134 decks529 decks
22%synergy
Deceptive Frostkite
25%inclusion77 decks312 decks
24%synergy
Ojutai, Soul of Winter
24%inclusion8 decks33 decks
24%synergy
Temur Battlecrier
24%inclusion77 decks326 decks
16%synergy
Draconic Muralists
22%inclusion117 decks529 decks
22%synergy
Niv-Mizzet, Parun
22%inclusion117 decks529 decks
14%synergy
Thunderbreak Regent
21%inclusion112 decks529 decks
20%synergy
Rapacious Dragon
21%inclusion111 decks529 decks
20%synergy
Deadeye Navigator
20%inclusion106 decks529 decks
18%synergy
Cavern-Hoard Dragon
20%inclusion106 decks529 decks
18%synergy
Betor, Kin to All
20%inclusion5 decks25 decks
15%synergy
Broodcaller Scourge
20%inclusion62 decks312 decks
19%synergy
Renari, Merchant of Marvels
20%inclusion105 decks529 decks
19%synergy
Dragonhawk, Fate's Tempest
20%inclusion89 decks450 decks
18%synergy
Scourge of the Throne
19%inclusion101 decks529 decks
17%synergy
Dragonborn Champion
19%inclusion99 decks529 decks
17%synergy
Birds of Paradise
19%inclusion98 decks529 decks
-9%synergy
Silumgar, the Drifting Death
18%inclusion6 decks33 decks
17%synergy
Rivaz of the Claw
18%inclusion6 decks33 decks
16%synergy
Iymrith, Desert Doom
18%inclusion94 decks529 decks
17%synergy
Firkraag, Cunning Instigator
18%inclusion93 decks529 decks
16%synergy
Bloomvine Regent
17%inclusion55 decks326 decks
15%synergy
Glasspool Mimic
16%inclusion87 decks529 decks
14%synergy
Keiga, the Tide Star
15%inclusion81 decks529 decks
15%synergy
Dragonmaster Outcast
15%inclusion81 decks529 decks
13%synergy
Scalelord Reckoner
15%inclusion5 decks33 decks
15%synergy
Instants
Counterspell
43%inclusion228 decks529 decks
1%synergy
Beast Within
35%inclusion185 decks529 decks
0%synergy
Heroic Intervention
31%inclusion164 decks529 decks
1%synergy
Chaos Warp
31%inclusion163 decks529 decks
1%synergy
Sarkhan's Triumph
29%inclusion156 decks529 decks
29%synergy
Swords to Plowshares
27%inclusion9 decks33 decks
-34%synergy
Negate
21%inclusion113 decks529 decks
0%synergy
Ghostly Flicker
21%inclusion111 decks529 decks
16%synergy
Mana Drain
20%inclusion105 decks529 decks
5%synergy
Deflecting Swat
18%inclusion96 decks529 decks
1%synergy
Path to Exile
15%inclusion5 decks33 decks
-32%synergy
Second Harvest
14%inclusion73 decks529 decks
9%synergy
Return of the Wildspeaker
14%inclusion72 decks529 decks
2%synergy
Growth Spiral
13%inclusion71 decks529 decks
-7%synergy
Double Major
13%inclusion67 decks529 decks
10%synergy
Arcane Denial
12%inclusion64 decks529 decks
-8%synergy
An Offer You Can't Refuse
12%inclusion62 decks529 decks
-13%synergy
Klauth's Will
11%inclusion58 decks529 decks
10%synergy
Render Silent
9.1%inclusion3 decks33 decks
7%synergy
Deadly Rollick
9.1%inclusion3 decks33 decks
-4%synergy
Teferi's Protection
9.1%inclusion3 decks33 decks
-8%synergy
Archdruid's Charm
8.9%inclusion47 decks526 decks
4%synergy
Blur
8.5%inclusion45 decks529 decks
7%synergy
Essence Flux
7.9%inclusion42 decks529 decks
5%synergy
Chord of Calling
7.9%inclusion42 decks529 decks
3%synergy
Pact of Negation
7.8%inclusion41 decks529 decks
1%synergy
Return to Nature
7.6%inclusion40 decks529 decks
3%synergy
Krosan Grip
7.6%inclusion40 decks529 decks
2%synergy
Displace
7.2%inclusion38 decks529 decks
6%synergy
Force of Will
7.2%inclusion38 decks529 decks
-3%synergy
Mystical Tutor
7.2%inclusion38 decks529 decks
-5%synergy
Kindred Summons
6.8%inclusion36 decks529 decks
6%synergy
Draconic Lore
6.6%inclusion35 decks529 decks
6%synergy
Spit Flame
6.4%inclusion34 decks529 decks
6%synergy
Planar Incision
6.4%inclusion34 decks529 decks
5%synergy
Force of Negation
6.4%inclusion34 decks529 decks
-2%synergy
Rapid Hybridization
6.4%inclusion34 decks529 decks
-3%synergy
Stubborn Denial
6.2%inclusion33 decks529 decks
4%synergy
Entish Restoration
5.7%inclusion30 decks529 decks
-1%synergy
Nature's Claim
5.7%inclusion30 decks529 decks
-2%synergy
Abrade
5.7%inclusion30 decks529 decks
-6%synergy
Brainstorm
5.7%inclusion30 decks529 decks
-13%synergy
Dragon's Fire
5.5%inclusion29 decks529 decks
5%synergy
Swan Song
5.5%inclusion29 decks529 decks
-12%synergy
Smuggler's Surprise
5.4%inclusion27 decks496 decks
3%synergy
Magmaquake
5.3%inclusion28 decks529 decks
5%synergy
Dispelling Exhale
5.2%inclusion16 decks309 decks
5%synergy
Sorceries
Farseek
45%inclusion237 decks529 decks
9%synergy
Crux of Fate
42%inclusion14 decks33 decks
40%synergy
Nature's Lore
42%inclusion221 decks529 decks
10%synergy
Kodama's Reach
41%inclusion215 decks529 decks
13%synergy
Rampant Growth
36%inclusion191 decks529 decks
3%synergy
Three Visits
31%inclusion164 decks529 decks
7%synergy
Blasphemous Act
31%inclusion162 decks529 decks
-3%synergy
Rite of Replication
22%inclusion118 decks529 decks
19%synergy
Grim Tutor
18%inclusion6 decks33 decks
14%synergy
Genesis Ultimatum
12%inclusion66 decks529 decks
8%synergy
Diabolic Tutor
12%inclusion4 decks33 decks
6%synergy
Skyshroud Claim
12%inclusion64 decks529 decks
4%synergy
Bala Ged Recovery
12%inclusion63 decks529 decks
4%synergy
Jeska's Will
12%inclusion62 decks529 decks
-4%synergy
Rishkar's Expertise
11%inclusion58 decks529 decks
1%synergy
Nature's Rhythm
11%inclusion33 decks314 decks
6%synergy
Finale of Devastation
10%inclusion52 decks529 decks
2%synergy
Vandalblast
10%inclusion51 decks529 decks
-6%synergy
Will of the Temur
10%inclusion30 decks312 decks
9%synergy
Shamanic Revelation
9.5%inclusion50 decks529 decks
2%synergy
Profane Tutor
9.1%inclusion3 decks33 decks
7%synergy
Eerie Ultimatum
9.1%inclusion3 decks33 decks
-2%synergy
Damn
9.1%inclusion3 decks33 decks
-6%synergy
Irenicus's Vile Duplication
8.3%inclusion44 decks529 decks
5%synergy
Raise the Palisade
7.2%inclusion38 decks529 decks
4%synergy
Explore
6.0%inclusion32 decks529 decks
-4%synergy
Last March of the Ents
5.5%inclusion29 decks529 decks
2%synergy
Utility Artifacts
Urza's Incubator
39%inclusion208 decks529 decks
36%synergy
Herald's Horn
28%inclusion147 decks529 decks
22%synergy
Swiftfoot Boots
25%inclusion133 decks529 decks
-2%synergy
Lightning Greaves
25%inclusion130 decks529 decks
0%synergy
Helm of the Host
18%inclusion97 decks529 decks
15%synergy
Monster Manual
17%inclusion88 decks529 decks
15%synergy
Fist of Suns
15%inclusion5 decks33 decks
9%synergy
Conjurer's Closet
12%inclusion61 decks529 decks
9%synergy
The Great Henge
11%inclusion60 decks529 decks
2%synergy
Shadowspear
8.9%inclusion47 decks529 decks
5%synergy
Strionic Resonator
7.2%inclusion38 decks529 decks
5%synergy
Banner of Kinship
6.5%inclusion26 decks403 decks
4%synergy
Cloudstone Curio
5.5%inclusion29 decks529 decks
5%synergy
The One Ring
5.5%inclusion29 decks529 decks
-3%synergy
Mirror Box
5.3%inclusion28 decks529 decks
4%synergy
Enchantments
Dracogenesis
39%inclusion127 decks326 decks
37%synergy
Reflections of Littjara
31%inclusion164 decks529 decks
27%synergy
Anointed Procession
30%inclusion10 decks33 decks
23%synergy
Kindred Discovery
29%inclusion153 decks529 decks
22%synergy
Rhythm of the Wild
26%inclusion140 decks529 decks
4%synergy
Leyline of the Guildpact
24%inclusion8 decks33 decks
9%synergy
Encroaching Dragonstorm
22%inclusion71 decks326 decks
20%synergy
Call the Spirit Dragons
21%inclusion5 decks24 decks
14%synergy
Warstorm Surge
20%inclusion104 decks529 decks
15%synergy
Virtue of Knowledge
19%inclusion101 decks529 decks
17%synergy
Sneak Attack
17%inclusion91 decks529 decks
15%synergy
Elemental Bond
17%inclusion91 decks529 decks
12%synergy
Acolyte of Bahamut
17%inclusion90 decks529 decks
17%synergy
Crucible of Fire
16%inclusion84 decks529 decks
15%synergy
Aggravated Assault
14%inclusion76 decks529 decks
10%synergy
Breaching Dragonstorm
10%inclusion33 decks319 decks
9%synergy
Life Finds a Way
10%inclusion53 decks529 decks
10%synergy
Dragonback Assault
10%inclusion31 decks323 decks
6%synergy
Molten Echoes
9.5%inclusion50 decks529 decks
8%synergy
Insidious Roots
9.1%inclusion3 decks33 decks
3%synergy
Frontier Siege
8.9%inclusion47 decks529 decks
8%synergy
Up the Beanstalk
8.7%inclusion46 decks529 decks
5%synergy
Frostcliff Siege
8.3%inclusion27 decks326 decks
3%synergy
Food Chain
7.9%inclusion42 decks529 decks
6%synergy
Exploration
7.2%inclusion38 decks529 decks
-1%synergy
Mystic Remora
7.2%inclusion38 decks529 decks
-9%synergy
Bower Passage
6.0%inclusion32 decks529 decks
6%synergy
Defense of the Heart
5.9%inclusion31 decks529 decks
3%synergy
Curiosity
5.7%inclusion30 decks529 decks
1%synergy
Roiling Dragonstorm
5.5%inclusion18 decks326 decks
5%synergy
Impostor Syndrome
5.4%inclusion6 decks111 decks
3%synergy
Lurking Predators
5.3%inclusion28 decks529 decks
4%synergy
There and Back Again
5.3%inclusion28 decks529 decks
4%synergy
Nature's Will
5.1%inclusion27 decks529 decks
4%synergy
Battles
Invasion of Tarkir
7.8%inclusion41 decks529 decks
7%synergy
Planeswalkers
Sarkhan Unbroken
25%inclusion133 decks529 decks
23%synergy
Sivitri, Dragon Master
24%inclusion8 decks33 decks
24%synergy
Sarkhan, Fireblood
8.5%inclusion45 decks529 decks
8%synergy
Sarkhan the Masterless
8.1%inclusion43 decks529 decks
7%synergy
Sarkhan, Dragonsoul
6.8%inclusion36 decks529 decks
7%synergy
Utility Lands
Reliquary Tower
38%inclusion203 decks529 decks
8%synergy
Three Tree City
24%inclusion108 decks451 decks
19%synergy
Mistrise Village
20%inclusion65 decks323 decks
12%synergy
Crucible of the Spirit Dragon
19%inclusion99 decks529 decks
18%synergy
Yavimaya, Cradle of Growth
19%inclusion99 decks529 decks
10%synergy
Mosswort Bridge
16%inclusion85 decks529 decks
6%synergy
Otawara, Soaring City
14%inclusion75 decks529 decks
-2%synergy
Command Beacon
14%inclusion73 decks529 decks
9%synergy
Arena of Glory
12%inclusion58 decks465 decks
6%synergy
Temple of the False God
12%inclusion63 decks529 decks
3%synergy
Boseiju, Who Endures
10%inclusion51 decks529 decks
-9%synergy
Scavenger Grounds
9.5%inclusion50 decks529 decks
6%synergy
Rogue's Passage
8.5%inclusion45 decks529 decks
-12%synergy
Kessig Wolf Run
6.0%inclusion32 decks529 decks
-9%synergy
Mana Artifacts
Sol Ring
92%inclusion486 decks529 decks
8%synergy
Arcane Signet
81%inclusion430 decks529 decks
9%synergy
Dragon's Hoard
52%inclusion273 decks529 decks
50%synergy
Cursed Mirror
36%inclusion190 decks529 decks
30%synergy
Carnelian Orb of Dragonkind
34%inclusion178 decks529 decks
32%synergy
Jade Orb of Dragonkind
32%inclusion167 decks529 decks
31%synergy
Chromatic Lantern
28%inclusion146 decks529 decks
19%synergy
Mox Jasper
23%inclusion79 decks348 decks
22%synergy
Dragonstorm Globe
22%inclusion71 decks319 decks
22%synergy
Orb of Dragonkind
21%inclusion113 decks529 decks
20%synergy
Timeless Lotus
21%inclusion7 decks33 decks
11%synergy
Lapis Orb of Dragonkind
19%inclusion102 decks529 decks
19%synergy
Fellwar Stone
15%inclusion77 decks529 decks
-6%synergy
Commander's Sphere
14%inclusion72 decks529 decks
1%synergy
Izzet Signet
12%inclusion64 decks529 decks
-12%synergy
Talisman of Creativity
12%inclusion64 decks529 decks
-16%synergy
Talisman of Impulse
12%inclusion61 decks529 decks
1%synergy
Gruul Signet
11%inclusion56 decks529 decks
1%synergy
Machine God's Effigy
10%inclusion54 decks529 decks
9%synergy
Simic Signet
9.5%inclusion50 decks529 decks
-2%synergy
Talisman of Curiosity
8.3%inclusion44 decks529 decks
-5%synergy
Decanter of Endless Water
6.8%inclusion36 decks529 decks
3%synergy
Herd Heirloom
6.6%inclusion21 decks319 decks
3%synergy
Patchwork Banner
6.4%inclusion29 decks450 decks
2%synergy
Thought Vessel
6.4%inclusion34 decks529 decks
-11%synergy
Lands
Command Tower
93%inclusion492 decks529 decks
19%synergy
Haven of the Spirit Dragon
64%inclusion338 decks529 decks
63%synergy
Frontier Bivouac
55%inclusion293 decks529 decks
27%synergy
Path of Ancestry
54%inclusion286 decks529 decks
32%synergy
Ketria Triome
48%inclusion255 decks529 decks
17%synergy
Stomping Ground
48%inclusion253 decks529 decks
7%synergy
Cinder Glade
47%inclusion247 decks529 decks
9%synergy
Breeding Pool
46%inclusion241 decks529 decks
4%synergy
Overgrown Tomb
45%inclusion15 decks33 decks
5%synergy
Maelstrom of the Spirit Dragon
44%inclusion142 decks326 decks
43%synergy
Steam Vents
43%inclusion228 decks529 decks
5%synergy
Exotic Orchard
43%inclusion225 decks529 decks
6%synergy
Sacred Foundry
42%inclusion14 decks33 decks
6%synergy
Rockfall Vale
37%inclusion197 decks529 decks
16%synergy
Sulfur Falls
36%inclusion193 decks529 decks
1%synergy
Spire Garden
35%inclusion183 decks529 decks
12%synergy
Jungle Shrine
33%inclusion11 decks33 decks
2%synergy
Godless Shrine
33%inclusion11 decks33 decks
-8%synergy
Wooded Foothills
33%inclusion172 decks529 decks
22%synergy
Misty Rainforest
33%inclusion172 decks529 decks
21%synergy
Rejuvenating Springs
33%inclusion172 decks529 decks
6%synergy
Scalding Tarn
32%inclusion169 decks529 decks
21%synergy
Training Center
32%inclusion169 decks529 decks
7%synergy
Temple of the Dragon Queen
30%inclusion161 decks529 decks
30%synergy
Ziatora's Proving Ground
30%inclusion10 decks33 decks
3%synergy
Blood Crypt
30%inclusion10 decks33 decks
-7%synergy
Temple Garden
30%inclusion10 decks33 decks
-8%synergy
Watery Grave
30%inclusion10 decks33 decks
-11%synergy
Hinterland Harbor
30%inclusion158 decks529 decks
-3%synergy
Rootbound Crag
28%inclusion150 decks529 decks
1%synergy
Cavern of Souls
28%inclusion147 decks529 decks
21%synergy
Opulent Palace
27%inclusion9 decks33 decks
-1%synergy
Jetmir's Garden
27%inclusion9 decks33 decks
-2%synergy
Hallowed Fountain
27%inclusion9 decks33 decks
-12%synergy
Stormcarved Coast
27%inclusion144 decks529 decks
8%synergy
Unclaimed Territory
26%inclusion135 decks529 decks
21%synergy
Secluded Courtyard
24%inclusion129 decks529 decks
20%synergy
Evolving Wilds
24%inclusion129 decks529 decks
4%synergy
Sandsteppe Citadel
24%inclusion8 decks33 decks
-1%synergy
Seaside Citadel
24%inclusion8 decks33 decks
-2%synergy
The World Tree
24%inclusion8 decks33 decks
-4%synergy
Crumbling Necropolis
24%inclusion8 decks33 decks
-4%synergy
Nomad Outpost
24%inclusion8 decks33 decks
-5%synergy
Dreamroot Cascade
24%inclusion127 decks529 decks
3%synergy
Shivan Reef
24%inclusion125 decks529 decks
-6%synergy
Reflecting Pool
21%inclusion113 decks529 decks
16%synergy
Savage Lands
21%inclusion7 decks33 decks
0%synergy
Raugrin Triome
21%inclusion7 decks33 decks
-3%synergy
Zagoth Triome
21%inclusion7 decks33 decks
-7%synergy
Arcane Sanctum
21%inclusion7 decks33 decks
-7%synergy