Sai, Master Thopterist + Myr Retriever + Workshop Assistant + Ashnod's Altar
Sai, Master Thopterist
Myr Retriever
Workshop Assistant
Ashnod's Altar
Requires
Sai, Master Thopterist must be on the battlefield.
Myr Retriever must be in the graveyard.
Workshop Assistant must be on the battlefield.
Ashnod's Altar must be on the battlefield.
Steps
- Activate Ashnod's Altar by sacrificing Workshop Assistant, adding .
- Workshop Assistant dies, returning Myr Retriever from your graveyard to your hand.
- Cast Myr Retriever by paying
. - Sai triggers, creating a 1/1 Thopter artifact creature token.
- Activate Ashnod's Altar twice by sacrificing the Thopter and Myr Retriever, adding .
- Myr Retriever dies, returning Workshop Assistant from your graveyard to your hand.
- Cast Workshop Assistant by paying
. - Sai triggers, creating a 1/1 Thopter artifact creature token.
- Repeat.
Results
Infinite colorless mana. Infinite creature tokens. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite storm count.
Sai, Master Thopterist
5.91% of 1742 decks
103 decks
Eloise, Nephalia Sleuth
2.09% of 1437 decks
30 decks
Ashnod the Uncaring
1.74% of 2938 decks
51 decks
Emry, Lurker of the Loch
1.15% of 4002 decks
46 decks
Breya, Etherium Shaper
0.78% of 13395 decks
104 decks
New Cards
Fountainport
60% of 5 decks
+53% synergy
High Synergy Cards
Etherium Sculptor
87% of 687 decks
+84% synergy
Scrap Trawler
82% of 687 decks
+80% synergy
Foundry Inspector
82% of 687 decks
+78% synergy
Junk Diver
67% of 687 decks
+66% synergy
Seat of the Synod
68% of 687 decks
+65% synergy
Emry, Lurker of the Loch
66% of 682 decks
+63% synergy
Vault of Whispers
65% of 338 decks
+63% synergy
Great Furnace
65% of 258 decks
+62% synergy
Thopter Foundry
61% of 179 decks
+61% synergy
Krark-Clan Ironworks
61% of 687 decks
+60% synergy
Top Cards
Crystal Skull, Isu Spyglass
60% of 35 decks
+57% synergy
Enthusiastic Mechanaut
55% of 251 decks
+54% synergy
Swords to Plowshares
54% of 265 decks
+25% synergy
Marionette Master
53% of 338 decks
+51% synergy
Jhoira, Weatherlight Captain
53% of 258 decks
+51% synergy
Mirrodin Besieged
53% of 684 decks
+52% synergy
Counterspell
50% of 687 decks
+29% synergy
Forensic Gadgeteer
48% of 176 decks
+46% synergy
Time Sieve
47% of 338 decks
+47% synergy
Marionette Apprentice
47% of 51 decks
+42% synergy
Creatures
Thought Monitor
45% of 673 decks
+44% synergy
Goblin Engineer
44% of 256 decks
+42% synergy
Solemn Simulacrum
43% of 687 decks
+29% synergy
Loyal Inventor
43% of 14 decks
+40% synergy
Jhoira's Familiar
43% of 687 decks
+41% synergy
Teshar, Ancestor's Apostle
42% of 265 decks
+41% synergy
Reckless Fireweaver
42% of 258 decks
+40% synergy
Baleful Strix
39% of 338 decks
+35% synergy
Disciple of the Vault
37% of 338 decks
+36% synergy
Goblin Welder
35% of 258 decks
+33% synergy
Urza, Lord High Artificer
32% of 684 decks
+30% synergy
Vedalken Archmage
30% of 687 decks
+29% synergy
Shimmer Myr
30% of 687 decks
+28% synergy
The Reality Chip
30% of 661 decks
+28% synergy
Esper Sentinel
30% of 260 decks
+20% synergy
Imskir Iron-Eater
29% of 17 decks
+29% synergy
Oswald Fiddlebender
28% of 258 decks
+27% synergy
Jan Jansen, Chaos Crafter
28% of 108 decks
+27% synergy
Molten Gatekeeper
28% of 18 decks
+25% synergy
Padeem, Consul of Innovation
28% of 687 decks
+26% synergy
Haywire Mite
26% of 34 decks
+25% synergy
Phyrexian Metamorph
26% of 687 decks
+22% synergy
Trinket Mage
25% of 687 decks
+23% synergy
Myr Battlesphere
23% of 687 decks
+21% synergy
Copper Myr
23% of 39 decks
+23% synergy
Ornithopter
23% of 687 decks
+21% synergy
Ornithopter of Paradise
23% of 673 decks
+18% synergy
Trophy Mage
22% of 687 decks
+21% synergy
Glaring Fleshraker
22% of 87 decks
+19% synergy
Liberator, Urza's Battlethopter
21% of 571 decks
+19% synergy
Tribute Mage
21% of 684 decks
+20% synergy
Imotekh the Stormlord
21% of 297 decks
+20% synergy
Kuldotha Forgemaster
20% of 687 decks
+19% synergy
Crime Novelist
20% of 60 decks
+18% synergy
Silver Myr
19% of 687 decks
+18% synergy
Illustrious Wanderglyph
19% of 93 decks
+18% synergy
Meria, Scholar of Antiquity
19% of 21 decks
+19% synergy
Riddlesmith
19% of 687 decks
+18% synergy
Seedborn Muse
18% of 39 decks
+14% synergy
Sharuum the Hegemon
18% of 179 decks
+18% synergy
Oltec Matterweaver
18% of 62 decks
+17% synergy
Mirkwood Bats
18% of 148 decks
+11% synergy
Hydroelectric Specimen
17% of 52 decks
+13% synergy
Master Transmuter
17% of 687 decks
+16% synergy
Mayhem Devil
17% of 184 decks
+15% synergy
Dockside Extortionist
17% of 256 decks
+9% synergy
Chief Engineer
17% of 687 decks
+16% synergy
Kappa Cannoneer
16% of 661 decks
+15% synergy
Sarinth Steelseeker
16% of 31 decks
+16% synergy
Walking Ballista
16% of 687 decks
+13% synergy
Instants
Whir of Invention
37% of 687 decks
+35% synergy
Beast Within
33% of 39 decks
+15% synergy
Desynchronization
32% of 22 decks
+29% synergy
Dispatch
32% of 265 decks
+29% synergy
Path to Exile
30% of 265 decks
+10% synergy
Cyclonic Rift
27% of 687 decks
+13% synergy
Negate
25% of 687 decks
+13% synergy
Chaos Warp
24% of 258 decks
+8% synergy
An Offer You Can't Refuse
24% of 641 decks
+14% synergy
Enlightened Tutor
23% of 265 decks
+15% synergy
Arcane Denial
21% of 687 decks
+12% synergy
Assassin's Trophy
20% of 15 decks
+14% synergy
Sink into Stupor
19% of 108 decks
+12% synergy
Generous Gift
18% of 263 decks
+6% synergy
Deadly Dispute
18% of 330 decks
+12% synergy
Anguished Unmaking
17% of 179 decks
+12% synergy
Fierce Guardianship
17% of 675 decks
+8% synergy
Dovin's Veto
17% of 264 decks
+12% synergy
Pongify
16% of 687 decks
+10% synergy
Dramatic Reversal
15% of 687 decks
+13% synergy
Heroic Intervention
15% of 39 decks
+2% synergy
Mana Drain
15% of 687 decks
+8% synergy
Swan Song
15% of 687 decks
+7% synergy
Thirst for Knowledge
15% of 687 decks
+14% synergy
Reality Shift
15% of 687 decks
+10% synergy
Vampiric Tutor
14% of 338 decks
+4% synergy
Rapid Hybridization
13% of 687 decks
+8% synergy
Stoic Rebuttal
12% of 687 decks
+11% synergy
Teferi's Protection
11% of 265 decks
+2% synergy
Resculpt
11% of 673 decks
+9% synergy
Void Rend
11% of 170 decks
+9% synergy
Bedevil
10% of 184 decks
+7% synergy
Worldly Tutor
10% of 39 decks
+4% synergy
Brainstorm
10% of 687 decks
-0% synergy
Despark
10% of 178 decks
+6% synergy
Fell the Profane
10% of 51 decks
+3% synergy
Paradoxical Outcome
10% of 687 decks
+9% synergy
Force of Will
9% of 687 decks
+4% synergy
Muddle the Mixture
9% of 687 decks
+6% synergy
Mystical Tutor
8% of 687 decks
+1% synergy
Demand Answers
8% of 63 decks
+4% synergy
Frantic Search
7% of 687 decks
+2% synergy
Go for the Throat
7% of 338 decks
+4% synergy
Disruption Protocol
7% of 661 decks
+7% synergy
Fanatical Offering
7% of 97 decks
+6% synergy
Infernal Grasp
7% of 329 decks
+3% synergy
Force of Negation
7% of 684 decks
+2% synergy
Faith's Reward
6% of 265 decks
+6% synergy
Dark Ritual
6% of 338 decks
-5% synergy
Bitter Triumph
6% of 97 decks
+3% synergy
Sorceries
Fabricate
43% of 687 decks
+40% synergy
Thoughtcast
32% of 687 decks
+30% synergy
Farseek
26% of 39 decks
+10% synergy
Blasphemous Act
24% of 258 decks
+8% synergy
Reshape
23% of 687 decks
+22% synergy
Organic Extinction
21% of 256 decks
+20% synergy
Feed the Swarm
19% of 332 decks
+10% synergy
Cultivate
18% of 39 decks
-4% synergy
Demonic Tutor
17% of 338 decks
+6% synergy
Vandalblast
13% of 258 decks
+5% synergy
Terisiare's Devastation
13% of 282 decks
+13% synergy
Wake the Past
13% of 142 decks
+12% synergy
Dance of the Manse
12% of 263 decks
+11% synergy
Trash for Treasure
12% of 258 decks
+11% synergy
Supreme Verdict
12% of 265 decks
+9% synergy
Toxic Deluge
12% of 338 decks
+3% synergy
Their Name Is Death
11% of 297 decks
+10% synergy
Scrap Mastery
10% of 258 decks
+10% synergy
Neoform
10% of 39 decks
+9% synergy
Three Visits
10% of 39 decks
-1% synergy
Windfall
10% of 687 decks
+3% synergy
Sevinne's Reclamation
9% of 263 decks
+6% synergy
Damnation
9% of 338 decks
+4% synergy
Faithless Looting
9% of 258 decks
+0% synergy
Austere Command
8% of 265 decks
+2% synergy
Bala Ged Recovery
8% of 39 decks
+3% synergy
Nature's Lore
8% of 39 decks
-7% synergy
Kodama's Reach
8% of 39 decks
-7% synergy
Rampant Growth
8% of 39 decks
-9% synergy
Reckless Handling
7% of 122 decks
+6% synergy
Farewell
7% of 256 decks
+1% synergy
Monumental Corruption
7% of 200 decks
+7% synergy
Gamble
7% of 258 decks
+2% synergy
Delete
7% of 88 decks
+6% synergy
Rise and Shine
7% of 673 decks
+6% synergy
Diabolic Intent
7% of 338 decks
+2% synergy
Damn
6% of 174 decks
+2% synergy
Preordain
6% of 687 decks
+1% synergy
Open the Vaults
6% of 265 decks
+5% synergy
Beseech the Mirror
5% of 132 decks
+3% synergy
Jeska's Will
5% of 254 decks
-4% synergy
Ponder
5% of 687 decks
-1% synergy
March of Progress
5% of 571 decks
+5% synergy
Brilliant Restoration
5% of 256 decks
+4% synergy
Utility Artifacts
Mystic Forge
46% of 684 decks
+44% synergy
Skullclamp
45% of 687 decks
+32% synergy
Ichor Wellspring
39% of 687 decks
+37% synergy
Cloud Key
37% of 687 decks
+35% synergy
Sensei's Divining Top
36% of 687 decks
+30% synergy
Sculpting Steel
29% of 687 decks
+27% synergy
Mishra's Bauble
29% of 687 decks
+28% synergy
Lightning Greaves
28% of 687 decks
+3% synergy
Aetherflux Reservoir
28% of 687 decks
+24% synergy
Trading Post
28% of 687 decks
+26% synergy
Unwinding Clock
28% of 687 decks
+25% synergy
Bolas's Citadel
25% of 337 decks
+20% synergy
Wayfarer's Bauble
25% of 687 decks
+14% synergy
Aether Spellbomb
24% of 687 decks
+24% synergy
Moonsilver Key
23% of 663 decks
+22% synergy
Swiftfoot Boots
22% of 687 decks
-6% synergy
The One Ring
21% of 382 decks
+12% synergy
Executioner's Capsule
18% of 338 decks
+17% synergy
Cranial Plating
18% of 338 decks
+17% synergy
Semblance Anvil
17% of 687 decks
+17% synergy
Encroaching Mycosynth
17% of 466 decks
+17% synergy
Simulacrum Synthesizer
17% of 127 decks
+16% synergy
Soul-Guide Lantern
17% of 676 decks
+16% synergy
Clock of Omens
17% of 687 decks
+16% synergy
Nihil Spellbomb
17% of 338 decks
+16% synergy
Pyrite Spellbomb
17% of 258 decks
+16% synergy
Ozolith, the Shattered Spire
17% of 18 decks
+14% synergy
Sword of the Meek
16% of 687 decks
+16% synergy
Oni-Cult Anvil
16% of 179 decks
+15% synergy
Phyrexian Altar
16% of 687 decks
+11% synergy
Mephitic Draught
15% of 97 decks
+15% synergy
Thousand Moons Smithy
15% of 93 decks
+13% synergy
Thopter Shop
15% of 220 decks
+15% synergy
Spine of Ish Sah
15% of 687 decks
+14% synergy
Nim Deathmantle
15% of 687 decks
+14% synergy
Blasting Station
14% of 687 decks
+14% synergy
Conduit of Worlds
14% of 29 decks
+11% synergy
Isochron Scepter
13% of 687 decks
+11% synergy
Forsaken Monument
13% of 674 decks
+11% synergy
Tormod's Crypt
13% of 687 decks
+12% synergy
Wishclaw Talisman
13% of 336 decks
+10% synergy
Conjurer's Bauble
13% of 687 decks
+12% synergy
Mycosynth Wellspring
12% of 687 decks
+12% synergy
Helm of Awakening
12% of 687 decks
+11% synergy
Esoteric Duplicator
12% of 124 decks
+12% synergy
Worldwalker Helm
12% of 124 decks
+11% synergy
Grinding Station
12% of 687 decks
+11% synergy
Vat of Rebirth
12% of 200 decks
+11% synergy
Rings of Brighthearth
12% of 687 decks
+10% synergy
Welding Jar
11% of 687 decks
+11% synergy
Enchantments
Efficient Construction
40% of 687 decks
+40% synergy
Thopter Spy Network
34% of 687 decks
+32% synergy
Rhystic Study
22% of 687 decks
+9% synergy
Biotransference
21% of 297 decks
+20% synergy
Smothering Tithe
21% of 264 decks
+10% synergy
Storm the Vault
19% of 258 decks
+19% synergy
Mystic Remora
14% of 687 decks
+6% synergy
Mechanized Production
14% of 687 decks
+12% synergy
Agent of the Iron Throne
14% of 318 decks
+12% synergy
Cryptolith Rite
13% of 39 decks
+11% synergy
Impact Tremors
11% of 258 decks
+7% synergy
Anointed Procession
11% of 265 decks
+6% synergy
Concordant Crossroads
10% of 39 decks
+9% synergy
Warleader's Call
10% of 39 decks
+7% synergy
Intruder Alarm
9% of 687 decks
+8% synergy
Goblin Bombardment
8% of 258 decks
+5% synergy
Wild Growth
8% of 39 decks
+3% synergy
Underworld Breach
7% of 254 decks
+4% synergy
Artificer Class
7% of 625 decks
+7% synergy
Phyrexian Scriptures
7% of 338 decks
+6% synergy
Pia's Revolution
7% of 258 decks
+6% synergy
Tempered Steel
6% of 265 decks
+5% synergy
The Antiquities War
6% of 687 decks
+6% synergy
Clan Crafter
6% of 625 decks
+6% synergy
Amphibian Downpour
5% of 58 decks
+3% synergy
Planeswalkers
Saheeli, Sublime Artificer
27% of 257 decks
+26% synergy
Tezzeret, Master of the Bridge
25% of 337 decks
+24% synergy
Daretti, Scrap Savant
24% of 258 decks
+23% synergy
Tezzeret the Seeker
17% of 687 decks
+15% synergy
Ugin, the Ineffable
12% of 685 decks
+10% synergy
Tezzeret, Artifice Master
10% of 687 decks
+10% synergy
Tezzeret, Betrayer of Flesh
8% of 661 decks
+7% synergy
Saheeli, Filigree Master
8% of 198 decks
+8% synergy
Oko, Thief of Crowns
8% of 39 decks
+6% synergy
Karn, the Great Creator
6% of 685 decks
+5% synergy
Utility Lands
Archway of Innovation
59% of 87 decks
+56% synergy
Ancient Den
58% of 265 decks
+56% synergy
Buried Ruin
51% of 687 decks
+46% synergy
Darksteel Citadel
51% of 687 decks
+47% synergy
Tree of Tales
44% of 39 decks
+43% synergy
Inventors' Fair
43% of 687 decks
+39% synergy
Academy Ruins
37% of 687 decks
+35% synergy
Reliquary Tower
33% of 687 decks
+4% synergy
Urza's Saga
26% of 673 decks
+18% synergy
Bojuka Bog
24% of 338 decks
+8% synergy
Fomori Vault
19% of 124 decks
+17% synergy
Treasure Vault
16% of 668 decks
+14% synergy
Otawara, Soaring City
15% of 661 decks
+7% synergy
Monumental Henge
14% of 35 decks
+12% synergy
Ancient Tomb
14% of 687 decks
+4% synergy
Urza's Mine
11% of 687 decks
+9% synergy
Urza's Tower
11% of 687 decks
+9% synergy
Mystic Sanctuary
11% of 682 decks
+5% synergy
Urza's Power Plant
11% of 687 decks
+9% synergy
Boseiju, Who Endures
10% of 39 decks
+1% synergy
Phyrexia's Core
8% of 687 decks
+7% synergy
Tomb of the Spirit Dragon
8% of 687 decks
+7% synergy
Temple of the False God
7% of 687 decks
-2% synergy
War Room
6% of 674 decks
-0% synergy
Urza's Workshop
6% of 571 decks
+5% synergy
Rivendell
6% of 328 decks
+3% synergy
Tolaria West
6% of 687 decks
+5% synergy
Takenuma, Abandoned Mire
5% of 328 decks
-0% synergy
Phyrexian Tower
5% of 338 decks
+1% synergy
Mana Artifacts
Sol Ring
95% of 687 decks
+11% synergy
Arcane Signet
78% of 682 decks
+7% synergy
Dimir Signet
47% of 338 decks
+39% synergy
Mind Stone
45% of 687 decks
+27% synergy
Azorius Signet
43% of 265 decks
+37% synergy
Talisman of Dominance
41% of 338 decks
+34% synergy
Talisman of Creativity
39% of 256 decks
+33% synergy
Izzet Signet
35% of 258 decks
+29% synergy
Orzhov Signet
33% of 179 decks
+27% synergy
Rakdos Signet
31% of 185 decks
+24% synergy
Thought Vessel
30% of 687 decks
+14% synergy
Fellwar Stone
30% of 687 decks
+9% synergy
Talisman of Progress
29% of 265 decks
+24% synergy
Talisman of Resilience
27% of 15 decks
+24% synergy
Liquimetal Torque
26% of 673 decks
+22% synergy
Talisman of Conviction
26% of 144 decks
+21% synergy
Talisman of Hierarchy
24% of 177 decks
+19% synergy
Talisman of Indulgence
23% of 185 decks
+17% synergy
Talisman of Curiosity
23% of 39 decks
+20% synergy
Commander's Sphere
23% of 687 decks
+7% synergy
Lotus Petal
22% of 687 decks
+15% synergy
Boros Signet
21% of 146 decks
+16% synergy
Basalt Monolith
21% of 687 decks
+18% synergy
Chromatic Star
20% of 687 decks
+19% synergy
Everflowing Chalice
19% of 687 decks
+14% synergy
Simic Signet
18% of 39 decks
+15% synergy
Thran Dynamo
17% of 687 decks
+12% synergy
Mana Crypt
16% of 687 decks
+5% synergy
Mox Opal
16% of 687 decks
+11% synergy
Mana Vault
15% of 687 decks
+8% synergy
Gruul Signet
13% of 23 decks
+10% synergy
Mox Amber
13% of 687 decks
+9% synergy
Chromatic Sphere
12% of 687 decks
+12% synergy
Selesnya Signet
12% of 25 decks
+10% synergy
Slagstone Refinery
10% of 519 decks
+9% synergy
Gilded Lotus
10% of 687 decks
+6% synergy
Cursed Mirror
9% of 254 decks
+7% synergy
Chromatic Lantern
9% of 687 decks
-1% synergy
Springleaf Drum
8% of 687 decks
+6% synergy
The Mightstone and Weakstone
8% of 574 decks
+7% synergy
Hedron Archive
8% of 687 decks
+4% synergy
Jeweled Lotus
8% of 674 decks
+0% synergy
Machine God's Effigy
7% of 571 decks
+7% synergy
Sky Diamond
6% of 687 decks
+4% synergy
Skycloud Egg
6% of 265 decks
+6% synergy
Shadowblood Egg
6% of 185 decks
+6% synergy
Midnight Clock
6% of 682 decks
+3% synergy
Chrome Mox
6% of 687 decks
-1% synergy
Five Hundred Year Diary
5% of 260 decks
+5% synergy
Fabrication Foundry
5% of 93 decks
+5% synergy
Lands
Command Tower
61% of 687 decks
-12% synergy
Thornglint Bridge
56% of 25 decks
+56% synergy
Mistvault Bridge
54% of 332 decks
+53% synergy
Razortide Bridge
50% of 260 decks
+48% synergy
Drossforge Bridge
47% of 181 decks
+46% synergy
Darkmoss Bridge
47% of 15 decks
+46% synergy
Watery Grave
46% of 338 decks
+36% synergy
Tanglepool Bridge
46% of 39 decks
+45% synergy
Silverbluff Bridge
46% of 254 decks
+45% synergy
Goldmire Bridge
43% of 174 decks
+42% synergy
Hallowed Fountain
42% of 265 decks
+33% synergy
Steam Vents
40% of 258 decks
+30% synergy
Stomping Ground
39% of 23 decks
+30% synergy
Yavimaya Coast
38% of 39 decks
+33% synergy
Rustvale Bridge
37% of 142 decks
+36% synergy
Crumbling Necropolis
36% of 185 decks
+32% synergy
Shivan Reef
35% of 258 decks
+29% synergy
Blood Crypt
35% of 185 decks
+26% synergy
Godless Shrine
34% of 179 decks
+24% synergy
Rejuvenating Springs
33% of 39 decks
+27% synergy
Breeding Pool
33% of 39 decks
+24% synergy
Exotic Orchard
32% of 687 decks
-3% synergy
Sunken Hollow
31% of 338 decks
+23% synergy
Slagwoods Bridge
30% of 23 decks
+30% synergy
Indatha Triome
30% of 10 decks
+27% synergy
Mystic Monastery
29% of 146 decks
+26% synergy
Contaminated Landscape
29% of 14 decks
+27% synergy
Raffine's Tower
28% of 170 decks
+25% synergy
Drowned Catacomb
28% of 338 decks
+22% synergy
Spire of Industry
28% of 687 decks
+25% synergy
Arcane Sanctum
27% of 179 decks
+24% synergy
Morphic Pool
27% of 338 decks
+21% synergy
Xander's Lounge
27% of 178 decks
+24% synergy
Sea of Clouds
27% of 265 decks
+21% synergy
Prairie Stream
27% of 265 decks
+19% synergy
Zagoth Triome
27% of 15 decks
+23% synergy
Llanowar Wastes
27% of 15 decks
+21% synergy
Undergrowth Stadium
27% of 15 decks
+21% synergy
Overgrown Tomb
27% of 15 decks
+17% synergy
Training Center
26% of 254 decks
+20% synergy
Karplusan Forest
26% of 23 decks
+22% synergy
Glacial Fortress
26% of 265 decks
+21% synergy
Sacred Foundry
26% of 146 decks
+18% synergy
Jetmir's Garden
25% of 16 decks
+21% synergy
Raugrin Triome
25% of 142 decks
+22% synergy
Spara's Headquarters
24% of 25 decks
+20% synergy
The Mycosynth Gardens
23% of 466 decks
+20% synergy
Underground River
22% of 338 decks
+17% synergy
Ketria Triome
22% of 23 decks
+18% synergy
Shipwreck Marsh
22% of 329 decks
+17% synergy