Hoard-Smelter Dragon (Card)

Hoard-Smelter Dragon
In 9848 decks 1% of 1873965 decks
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Top Commanders (18)
Atarka, World Render
54.73% of 2704 decks 1480 decks
Lathliss, Dragon Queen
33.37% of 1819 decks 607 decks
Thrakkus the Butcher
25.35% of 497 decks 126 decks
Vrondiss, Rage of Ancients
24.49% of 2858 decks 700 decks
Klauth, Unrivaled Ancient
20.79% of 1924 decks 400 decks
Ganax, Astral Hunter // Acolyte of Bahamut
20.10% of 1169 decks 235 decks
Zirilan of the Claw
19.47% of 601 decks 117 decks
Rivaz of the Claw
11.85% of 2482 decks 294 decks
Dynaheir, Invoker Adept
9.99% of 1422 decks 142 decks
Agatha of the Vile Cauldron
8.82% of 2664 decks 235 decks
Daretti, Scrap Savant
8.70% of 2805 decks 244 decks
Osgir, the Reconstructor
5.67% of 6688 decks 379 decks
Miirym, Sentinel Wyrm
4.14% of 21665 decks 898 decks
Tiamat
3.44% of 6514 decks 224 decks
Firkraag, Cunning Instigator
3.03% of 3197 decks 97 decks
Magda, Brazen Outlaw
2.31% of 9434 decks 218 decks
The Ur-Dragon
1.97% of 23572 decks 465 decks
Kaalia of the Vast
1.68% of 15742 decks 264 decks
New Cards (5)
Leyline of the Guildpact
38% of 26 decks +36% synergy
Commercial District
36% of 128 decks +32% synergy
Lush Portico
29% of 24 decks +25% synergy
Incinerator of the Guilty
27% of 346 decks +26% synergy
Bristling Backwoods
25% of 16 decks +21% synergy
High Synergy Cards (10)
Savage Ventmaw
74% of 5991 decks +72% synergy
Garruk's Uprising
70% of 5887 decks +63% synergy
Dragonspeaker Shaman
60% of 9847 decks +58% synergy
Dragonlord's Servant
58% of 9799 decks +56% synergy
Scourge of Valkas
58% of 9833 decks +56% synergy
Atarka, World Render
57% of 5991 decks +55% synergy
Korlessa, Scale Singer
55% of 1649 decks +54% synergy
Cultivate
76% of 6000 decks +54% synergy
Thrakkus the Butcher
53% of 4979 decks +52% synergy
Decadent Dragon
51% of 301 decks +49% synergy
Top Cards (10)
Dragon's Hoard
61% of 9704 decks +59% synergy
Beast Within
57% of 6000 decks +38% synergy
Steel Hellkite
52% of 9847 decks +49% synergy
Rampant Growth
49% of 6000 decks +33% synergy
Thunderbreak Regent
48% of 9799 decks +48% synergy
Bladewing the Risen
48% of 2065 decks +47% synergy
Dragon Tempest
48% of 9799 decks +46% synergy
Crux of Fate
48% of 2054 decks +46% synergy
Dragonmaster Outcast
48% of 9847 decks +46% synergy
Shamanic Revelation
46% of 5991 decks +42% synergy
Creatures (50)
Drakuseth, Maw of Flames
46% of 9628 decks +44% synergy
Lozhan, Dragons' Legacy
43% of 2160 decks +42% synergy
Ganax, Astral Hunter
40% of 7752 decks +38% synergy
Dragonborn Champion
40% of 5685 decks +39% synergy
Silumgar, the Drifting Death
39% of 926 decks +38% synergy
Kolaghan, the Storm's Fury
37% of 2054 decks +36% synergy
Rivaz of the Claw
37% of 1144 decks +36% synergy
Rith, Liberated Primeval
36% of 663 decks +36% synergy
Scaled Nurturer
36% of 4457 decks +35% synergy
Teneb, the Harvester
36% of 860 decks +35% synergy
Demanding Dragon
35% of 9704 decks +35% synergy
Tyrant's Familiar
35% of 9826 decks +35% synergy
Lathliss, Dragon Queen
34% of 9704 decks +33% synergy
Earthquake Dragon
34% of 4792 decks +33% synergy
Dromoka, the Eternal
34% of 1141 decks +33% synergy
Renari, Merchant of Marvels
31% of 2140 decks +31% synergy
Tiamat
31% of 799 decks +30% synergy
Goblin Anarchomancer
31% of 5716 decks +28% synergy
Wrathful Red Dragon
30% of 7569 decks +29% synergy
Klauth, Unrivaled Ancient
30% of 5685 decks +29% synergy
Skyline Despot
30% of 9761 decks +29% synergy
Sakura-Tribe Elder
30% of 6000 decks +20% synergy
Sarkhan, Soul Aflame
28% of 729 decks +27% synergy
Miirym, Sentinel Wyrm
28% of 1615 decks +27% synergy
Dragonlord Dromoka
28% of 1141 decks +27% synergy
Ojutai, Soul of Winter
28% of 1049 decks +27% synergy
Harbinger of the Hunt
27% of 5991 decks +27% synergy
Deathbringer Regent
27% of 2054 decks +26% synergy
Flameblast Dragon
26% of 9847 decks +25% synergy
Roaming Throne
25% of 777 decks +8% synergy
Terror of Mount Velus
25% of 9557 decks +25% synergy
Niv-Mizzet, Guildpact
25% of 16 decks +25% synergy
Rapacious Dragon
25% of 9628 decks +24% synergy
Hellkite Tyrant
24% of 9838 decks +22% synergy
Utvara Hellkite
24% of 9839 decks +23% synergy
Thundermaw Hellkite
24% of 9839 decks +24% synergy
Iymrith, Desert Doom
24% of 2335 decks +23% synergy
Two-Headed Hellkite
24% of 507 decks +23% synergy
Chaos Dragon
23% of 8976 decks +23% synergy
Hoarding Broodlord
22% of 640 decks +21% synergy
Opportunistic Dragon
22% of 9602 decks +22% synergy
Scion of the Ur-Dragon
22% of 854 decks +22% synergy
Bladewing, Deathless Tyrant
22% of 1253 decks +22% synergy
Immersturm Predator
22% of 1927 decks +22% synergy
Hellkite Charger
22% of 9847 decks +21% synergy
Verix Bladewing
22% of 9713 decks +22% synergy
Old Gnawbone
22% of 5699 decks +19% synergy
Foe-Razer Regent
21% of 5991 decks +21% synergy
Draconic Muralists
21% of 4544 decks +21% synergy
Intet, the Dreamer
21% of 1873 decks +21% synergy
Instants (50)
Return to Nature
46% of 5933 decks +42% synergy
Spit Flame
38% of 9704 decks +37% synergy
Magmaquake
37% of 9839 decks +36% synergy
Return of the Wildspeaker
35% of 5919 decks +29% synergy
Klauth's Will
34% of 5685 decks +33% synergy
Boros Charm
31% of 2238 decks +26% synergy
Swords to Plowshares
28% of 2243 decks -0% synergy
Chaos Warp
26% of 9840 decks +10% synergy
Hunter's Insight
25% of 5996 decks +23% synergy
Terminate
24% of 2065 decks +19% synergy
Demand Answers
24% of 265 decks +17% synergy
Counterspell
23% of 2445 decks +2% synergy
Kindred Summons
22% of 5968 decks +21% synergy
Negate
20% of 2445 decks +8% synergy
Mortify
19% of 1161 decks +16% synergy
Return to Dust
19% of 2243 decks +17% synergy
Path to Exile
19% of 2243 decks -1% synergy
Blossoming Defense
18% of 5974 decks +17% synergy
Sarkhan's Triumph
18% of 9799 decks +17% synergy
Dispatch
17% of 2243 decks +15% synergy
Rakdos Charm
15% of 2061 decks +12% synergy
Bedevil
15% of 2008 decks +11% synergy
Dragon's Fire
15% of 8976 decks +14% synergy
Draconic Lore
15% of 1996 decks +14% synergy
Heroic Intervention
14% of 5971 decks +0% synergy
Putrefy
12% of 1136 decks +9% synergy
Thrill of Possibility
12% of 9602 decks +7% synergy
Unleash Fury
12% of 9526 decks +11% synergy
Entish Restoration
12% of 1550 decks +8% synergy
Generous Gift
11% of 2194 decks -1% synergy
Growth Spiral
10% of 1848 decks +6% synergy
Despark
10% of 1131 decks +6% synergy
Big Score
10% of 8070 decks +6% synergy
Utter End
10% of 1156 decks +8% synergy
Abrade
9% of 9731 decks +4% synergy
Crackling Doom
9% of 1156 decks +8% synergy
Archdruid's Charm
9% of 225 decks +4% synergy
Tyvar's Stand
9% of 2310 decks +6% synergy
Unexpected Windfall
8% of 9007 decks +5% synergy
Stroke of Midnight
8% of 319 decks +1% synergy
Cyclonic Rift
8% of 2444 decks -6% synergy
Anguished Unmaking
7% of 1154 decks +2% synergy
Dark Ritual
7% of 2065 decks -4% synergy
Teferi's Protection
7% of 2219 decks -3% synergy
Brainstorm
7% of 2445 decks -5% synergy
Naya Charm
7% of 1146 decks +6% synergy
Berserker's Frenzy
6% of 8976 decks +6% synergy
Harrow
6% of 6000 decks +1% synergy
Krosan Grip
6% of 6000 decks +1% synergy
Seething Song
6% of 9847 decks +3% synergy
Sorceries (50)
Kodama's Reach
34% of 6000 decks +18% synergy
Rishkar's Expertise
32% of 5971 decks +27% synergy
Chain Reaction
31% of 9847 decks +29% synergy
Harmonize
30% of 6000 decks +25% synergy
Vandalblast
28% of 9839 decks +19% synergy
Blasphemous Act
23% of 9839 decks +7% synergy
Farseek
23% of 6000 decks +7% synergy
Explore
21% of 6000 decks +17% synergy
Cleansing Nova
21% of 2210 decks +19% synergy
Nature's Lore
19% of 6000 decks +5% synergy
Wake the Past
19% of 2125 decks +18% synergy
Map the Frontier
18% of 22 decks +16% synergy
Clan Defiance
18% of 5996 decks +18% synergy
Rip Apart
18% of 2123 decks +17% synergy
Hunter's Prowess
17% of 5994 decks +17% synergy
Primal Might
17% of 5889 decks +17% synergy
Faithless Looting
16% of 9839 decks +8% synergy
Reconstruct History
16% of 2125 decks +15% synergy
Fearsome Awakening
15% of 2054 decks +15% synergy
Rout
15% of 2243 decks +14% synergy
Excavation Technique
14% of 2125 decks +13% synergy
Feed the Swarm
13% of 1950 decks +4% synergy
Patriarch's Bidding
13% of 2065 decks +12% synergy
Wild Endeavor
12% of 5685 decks +11% synergy
Secret Rendezvous
11% of 2125 decks +10% synergy
Victimize
11% of 2065 decks +5% synergy
Unburial Rites
11% of 1160 decks +10% synergy
Decimate
10% of 6000 decks +9% synergy
Austere Command
10% of 2243 decks +4% synergy
Wake the Dragon
10% of 450 decks +10% synergy
Three Visits
10% of 6000 decks -1% synergy
Read the Bones
9% of 2057 decks +5% synergy
Eerie Ultimatum
9% of 831 decks +8% synergy
Hell to Pay
9% of 32 decks +5% synergy
Sign in Blood
9% of 2065 decks +4% synergy
Diabolic Tutor
9% of 2065 decks +6% synergy
Last March of the Ents
9% of 1452 decks +6% synergy
Earthquake
9% of 9847 decks +8% synergy
Ruinous Ultimatum
9% of 1113 decks +7% synergy
Sweltering Suns
8% of 9739 decks +8% synergy
Genesis Ultimatum
8% of 1832 decks +8% synergy
Molten Collapse
8% of 165 decks +7% synergy
Skyshroud Claim
8% of 6000 decks +3% synergy
Mana Geyser
8% of 9847 decks +4% synergy
Demonic Tutor
7% of 2065 decks -5% synergy
Merciless Eviction
7% of 1160 decks +6% synergy
Painful Truths
7% of 2050 decks +5% synergy
Green Sun's Twilight
7% of 2214 decks +6% synergy
Jeska's Will
7% of 9471 decks -2% synergy
Explosive Vegetation
7% of 6000 decks +5% synergy
Utility Artifacts (26)
Swiftfoot Boots
38% of 9839 decks +10% synergy
Lightning Greaves
17% of 9847 decks -8% synergy
Archaeomancer's Map
17% of 2125 decks +15% synergy
Herald's Horn
15% of 9729 decks +9% synergy
Monster Manual
14% of 4457 decks +12% synergy
Wayfarer's Bauble
13% of 9847 decks +2% synergy
Fist of Suns
13% of 854 decks +12% synergy
Dispeller's Capsule
12% of 2243 decks +12% synergy
Swashbuckler's Whip
12% of 777 decks +11% synergy
Bag of Tricks
11% of 5685 decks +11% synergy
Hazoret's Monument
10% of 9739 decks +9% synergy
Doors of Durin
8% of 1652 decks +7% synergy
Agatha's Soul Cauldron
8% of 1590 decks +6% synergy
Diamond Pick-Axe
8% of 901 decks +6% synergy
Urza's Incubator
8% of 9847 decks +5% synergy
Ruby Medallion
7% of 9847 decks +5% synergy
Heirloom Blade
7% of 9729 decks +6% synergy
Battlemage's Bracers
7% of 9287 decks +6% synergy
Ichor Wellspring
7% of 9846 decks +5% synergy
Sword of Hours
6% of 8976 decks +6% synergy
Mycosynth Wellspring
6% of 9846 decks +5% synergy
Thousand-Year Elixir
6% of 9847 decks +3% synergy
Sculpting Steel
6% of 9847 decks +3% synergy
Collector's Vault
6% of 1412 decks +3% synergy
The Skullspore Nexus
5% of 501 decks +1% synergy
The Great Henge
5% of 5919 decks +0% synergy
Enchantments (41)
Crucible of Fire
39% of 9847 decks +38% synergy
Elemental Bond
37% of 5988 decks +34% synergy
Frontier Siege
36% of 5991 decks +35% synergy
Temur Ascendancy
35% of 1870 decks +33% synergy
Fires of Yavimaya
32% of 6000 decks +30% synergy
Warstorm Surge
30% of 9839 decks +27% synergy
Colossal Majesty
28% of 5955 decks +26% synergy
Rhythm of the Wild
27% of 5941 decks +21% synergy
Up the Beanstalk
23% of 990 decks +20% synergy
Omenpath Journey
19% of 16 decks +18% synergy
Rising of the Day
17% of 2317 decks +14% synergy
Kindred Discovery
17% of 2432 decks +14% synergy
Acolyte of Bahamut
16% of 5001 decks +15% synergy
Darksteel Mutation
15% of 2235 decks +13% synergy
Outpost Siege
15% of 9802 decks +14% synergy
Gratuitous Violence
15% of 9847 decks +14% synergy
Monologue Tax
15% of 2125 decks +14% synergy
There and Back Again
14% of 2564 decks +13% synergy
Mirari's Wake
13% of 1146 decks +9% synergy
Reflections of Littjara
11% of 2358 decks +8% synergy
Smothering Tithe
10% of 2198 decks -2% synergy
Tribute to the World Tree
9% of 2020 decks +4% synergy
Indomitable Might
9% of 5685 decks +8% synergy
Court of Garenbrig
9% of 864 decks +6% synergy
Phyrexian Arena
8% of 2065 decks +1% synergy
Molten Echoes
8% of 9544 decks +7% synergy
Dragon Cultist
8% of 7819 decks +8% synergy
The Kami War
8% of 747 decks +7% synergy
Barbarian Class
8% of 9022 decks +7% synergy
Virtue of Knowledge
7% of 410 decks +5% synergy
Animate Dead
7% of 2065 decks +2% synergy
Maddening Hex
7% of 8976 decks +7% synergy
Virtue of Strength
7% of 816 decks +5% synergy
Sarkhan's Unsealing
7% of 9704 decks +7% synergy
Rhystic Study
7% of 2445 decks -7% synergy
Warleader's Call
6% of 62 decks +2% synergy
Unnatural Growth
6% of 5358 decks +4% synergy
Descendants' Fury
5% of 1768 decks +5% synergy
Propaganda
5% of 2445 decks +0% synergy
Bower Passage
5% of 5996 decks +5% synergy
City on Fire
5% of 3245 decks +2% synergy
Battles (1)
Invasion of Tarkir
11% of 3379 decks +11% synergy
Planeswalkers (12)
Sivitri, Dragon Master
17% of 488 decks +17% synergy
Sarkhan the Masterless
16% of 9647 decks +16% synergy
Sarkhan Unbroken
16% of 1870 decks +15% synergy
Sarkhan, the Dragonspeaker
11% of 9826 decks +10% synergy
Sarkhan, Fireblood
8% of 9704 decks +8% synergy
Sarkhan the Mad
8% of 2065 decks +8% synergy
Domri, Anarch of Bolas
8% of 5936 decks +7% synergy
Kiora, Behemoth Beckoner
7% of 1847 decks +6% synergy
Daretti, Scrap Savant
6% of 9826 decks +5% synergy
Koth, Fire of Resistance
6% of 3926 decks +5% synergy
Nicol Bolas, Planeswalker
6% of 929 decks +5% synergy
Nicol Bolas, Dragon-God
5% of 900 decks +5% synergy
Utility Lands (27)
Mosswort Bridge
35% of 6000 decks +30% synergy
Crucible of the Spirit Dragon
29% of 9802 decks +28% synergy
Sunhome, Fortress of the Legion
23% of 2243 decks +22% synergy
Slayers' Stronghold
23% of 2238 decks +22% synergy
Ancient Den
20% of 2243 decks +17% synergy
Temple of the False God
19% of 9847 decks +10% synergy
Kessig Wolf Run
18% of 5996 decks +14% synergy
Rogue's Passage
17% of 9839 decks -1% synergy
Secluded Steppe
17% of 2243 decks +15% synergy
Bojuka Bog
15% of 2065 decks -1% synergy
Reliquary Tower
13% of 9847 decks -16% synergy
Spinerock Knoll
12% of 9847 decks +9% synergy
Forgotten Cave
12% of 9847 decks +9% synergy
Great Furnace
9% of 9847 decks +6% synergy
Darksteel Citadel
8% of 9847 decks +4% synergy
Underdark Rift
8% of 8976 decks +8% synergy
Desert
8% of 9847 decks +7% synergy
Restless Vents
7% of 176 decks +7% synergy
Mines of Moria
7% of 2588 decks +4% synergy
Castle Vantress
6% of 2395 decks +4% synergy
Phyrexia's Core
6% of 9846 decks +5% synergy
Mortuary Mire
6% of 2050 decks +3% synergy
Buried Ruin
6% of 9839 decks +0% synergy
Bonders' Enclave
5% of 9541 decks +3% synergy
Cave of the Frost Dragon
5% of 1960 decks +5% synergy
Restless Ridgeline
5% of 591 decks +4% synergy
Hidden Courtyard
5% of 214 decks +4% synergy
Mana Artifacts (43)
Sol Ring
86% of 9847 decks +1% synergy
Arcane Signet
71% of 9602 decks +1% synergy
Commander's Sphere
43% of 9826 decks +26% synergy
Carnelian Orb of Dragonkind
40% of 7688 decks +39% synergy
Jade Orb of Dragonkind
36% of 4890 decks +35% synergy
Rakdos Signet
30% of 2065 decks +23% synergy
Gruul Signet
30% of 6000 decks +27% synergy
Lapis Orb of Dragonkind
26% of 2127 decks +26% synergy
Boros Signet
24% of 2243 decks +18% synergy
Talisman of Impulse
23% of 6000 decks +22% synergy
Orb of Dragonkind
22% of 9058 decks +22% synergy
Izzet Signet
22% of 2445 decks +16% synergy
Mind Stone
20% of 9847 decks +2% synergy
Atarka Monument
18% of 5991 decks +18% synergy
Orzhov Signet
17% of 1161 decks +11% synergy
Boros Locket
14% of 2203 decks +14% synergy
Fire Diamond
14% of 9847 decks +11% synergy
Talisman of Creativity
13% of 2400 decks +6% synergy
Timeless Lotus
12% of 487 decks +11% synergy
Talisman of Conviction
11% of 2194 decks +6% synergy
Azorius Signet
11% of 1051 decks +5% synergy
Fellwar Stone
11% of 9847 decks -10% synergy
Talisman of Indulgence
11% of 2065 decks +5% synergy
Simic Signet
10% of 1873 decks +6% synergy
Component Pouch
9% of 8977 decks +9% synergy
Cursed Mirror
9% of 9281 decks +7% synergy
Hedron Archive
9% of 9785 decks +6% synergy
Charcoal Diamond
9% of 2065 decks +5% synergy
Kolaghan Monument
7% of 2054 decks +7% synergy
Glittering Stockpile
7% of 8070 decks +6% synergy
Chromatic Lantern
7% of 9839 decks -2% synergy
Selesnya Signet
7% of 1146 decks +5% synergy
Caged Sun
6% of 9846 decks +4% synergy
Golgari Signet
6% of 1136 decks +3% synergy
Sky Diamond
6% of 2445 decks +3% synergy
Dimir Signet
6% of 929 decks -2% synergy
Liquimetal Torque
6% of 9158 decks +2% synergy
Thran Dynamo
6% of 9847 decks +1% synergy
Luck Bobblehead
5% of 75 decks +3% synergy
Unstable Obelisk
5% of 9826 decks +5% synergy
Talisman of Hierarchy
5% of 1130 decks -0% synergy
Marble Diamond
5% of 2243 decks +3% synergy
Gilded Lotus
5% of 9847 decks +1% synergy
Lands (50)
Command Tower
74% of 9840 decks +1% synergy
Cinder Glade
71% of 5985 decks +62% synergy
Game Trail
60% of 5978 decks +56% synergy
Path of Ancestry
52% of 9729 decks +32% synergy
Haven of the Spirit Dragon
51% of 9799 decks +50% synergy
Temple of Abandon
39% of 5995 decks +36% synergy
Frontier Bivouac
37% of 1870 decks +34% synergy
Gruul Turf
37% of 6000 decks +34% synergy
Boros Garrison
34% of 2243 decks +31% synergy
Jungle Shrine
34% of 1146 decks +30% synergy
Rugged Highlands
33% of 5992 decks +32% synergy
Mossfire Valley
32% of 6000 decks +30% synergy
Exotic Orchard
32% of 9847 decks -2% synergy
Savage Lands
32% of 1136 decks +29% synergy
Smoldering Marsh
30% of 2050 decks +23% synergy
Temple of Triumph
30% of 2235 decks +26% synergy
Mystic Monastery
30% of 1049 decks +27% synergy
Battlefield Forge
29% of 2243 decks +24% synergy
Crumbling Necropolis
27% of 929 decks +24% synergy
Nomad Outpost
27% of 1156 decks +24% synergy
Rakdos Carnarium
25% of 2065 decks +22% synergy
Kazandu Refuge
25% of 6000 decks +25% synergy
Myriad Landscape
25% of 9826 decks +4% synergy
The World Tree
24% of 812 decks +22% synergy
Dragonskull Summit
23% of 2065 decks +17% synergy
Izzet Boilerworks
23% of 2445 decks +19% synergy
Evolving Wilds
23% of 9847 decks +1% synergy
Temple of Epiphany
23% of 2442 decks +19% synergy
Hedge Maze
23% of 35 decks +18% synergy
Opulent Palace
22% of 858 decks +19% synergy
Rockfall Vale
22% of 5393 decks +17% synergy
Elegant Parlor
21% of 62 decks +17% synergy
Ziatora's Proving Ground
21% of 918 decks +17% synergy
Underground Mortuary
20% of 20 decks +15% synergy
Bloodfell Caves
20% of 2054 decks +18% synergy
Raucous Theater
19% of 68 decks +15% synergy
Temple of the Dragon Queen
19% of 8988 decks +18% synergy
Blood Crypt
19% of 2065 decks +10% synergy
Sandsteppe Citadel
18% of 858 decks +16% synergy
Lorehold Campus
18% of 2125 decks +18% synergy
Timber Gorge
18% of 5981 decks +18% synergy
Stomping Ground
18% of 6000 decks +9% synergy
Foreboding Ruins
18% of 2047 decks +14% synergy
Temple of Malice
18% of 2057 decks +15% synergy
Rootbound Crag
18% of 6000 decks +13% synergy
Shivan Reef
17% of 2445 decks +12% synergy
Sacred Foundry
17% of 2243 decks +9% synergy
Overgrown Tomb
17% of 1136 decks +8% synergy
Jetmir's Garden
17% of 946 decks +12% synergy
Shivan Oasis
17% of 6000 decks +17% synergy