Adarkar Valkyrie + Intruder Alarm + Evil Twin

Adarkar Valkyrie
Intruder Alarm
Evil Twin

Requires
Adarkar Valkyrie must be on the battlefield. Intruder Alarm must be on the battlefield. Evil Twin must be in hand. Adarkar Valkyrie does not have summoning sickness. You control at least one legendary creature. Mana needed: 2
Steps
  1. Activate Adarkar Valkyrie by tapping it, targeting any legendary creature you control.
  2. Cast Evil Twin by paying 2, choosing to have it enter the battlefield as a copy of the legendary creature targeted in step 1.
  3. Put the legendary creature into your graveyard due to the legend rule.
  4. Adarkar Valkyrie and Intruder Alarm trigger.
  5. Resolve the Intruder Alarm trigger, untapping all creatures.
  6. Holding priority, activate Adarkar Valkyrie by tapping it, targeting Evil Twin.
  7. Resolve the Adarkar Valkyrie trigger from step 4, returning the legendary creature to the battlefield from your graveyard.
  8. Put Evil Twin into your graveyard due to the legend rule.
  9. Adarkar Valkyrie and Intruder Alarm trigger.
  10. Resolve the Intruder Alarm trigger, untapping all creatures.
  11. Holding priority, activate Adarkar Valkyrie by tapping it, targeting the legendary creature.
  12. Resolve the Adarkar Valkyrie trigger from step 9, returning Evil Twin to the battlefield from your graveyard as a copy of the legendary creature.
  13. Repeat from step 3.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mana creatures you control can produce. Infinite untap of all creatures.

Merieke Ri Berit
1.24% of 1860 decks 23 decks
High Synergy Cards
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78% of 23 decks +77% synergy
Ioreth of the Healing House
71% of 17 decks +70% synergy
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70% of 23 decks +69% synergy
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Kelpie Guide
59% of 22 decks +58% synergy
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61% of 23 decks +58% synergy
Second Wind
52% of 23 decks +52% synergy
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52% of 23 decks +52% synergy
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Counterspell
65% of 23 decks +22% synergy
Swiftfoot Boots
61% of 23 decks +34% synergy
Patriar's Seal
60% of 20 decks +59% synergy
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52% of 23 decks +51% synergy
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48% of 23 decks +47% synergy
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48% of 23 decks +47% synergy
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48% of 23 decks +45% synergy
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Robaran Mercenaries
45% of 20 decks +45% synergy
The Ever-Changing 'Dane
45% of 20 decks +45% synergy
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43% of 23 decks +43% synergy
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43% of 23 decks +40% synergy
Pippin, Guard of the Citadel
41% of 17 decks +40% synergy
Tideforce Elemental
39% of 23 decks +39% synergy
Royal Assassin
39% of 23 decks +38% synergy
Drumbellower
36% of 22 decks +35% synergy
Hostage Taker
35% of 23 decks +31% synergy
Esper Sentinel
32% of 22 decks +3% synergy
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30% of 23 decks +30% synergy
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30% of 23 decks +30% synergy
Coffin Queen
30% of 23 decks +30% synergy
Callous Oppressor
30% of 23 decks +30% synergy
Clever Impersonator
30% of 23 decks +28% synergy
Gonti, Lord of Luxury
30% of 23 decks +28% synergy
Phyrexian Metamorph
30% of 23 decks +21% synergy
Forensic Researcher
30% of 10 decks +30% synergy
Nightmare Shepherd
27% of 22 decks +25% synergy
Solemn Simulacrum
26% of 23 decks +5% synergy
Xanathar, Guild Kingpin
23% of 22 decks +21% synergy
Drana and Linvala
22% of 18 decks +19% synergy
Archivist
22% of 23 decks +22% synergy
Willbreaker
22% of 23 decks +21% synergy
Dragonlord Silumgar
22% of 23 decks +21% synergy
Sakashima the Impostor
22% of 23 decks +20% synergy
Sower of Temptation
22% of 23 decks +20% synergy
Baleful Strix
22% of 23 decks -1% synergy
Clever Conjurer
18% of 22 decks +18% synergy
Gisa, Glorious Resurrector
18% of 22 decks +18% synergy
Mind Flayer
18% of 22 decks +17% synergy
Thassa, Deep-Dwelling
18% of 22 decks +15% synergy
Opposition Agent
18% of 22 decks +7% synergy
Beguiler of Wills
17% of 23 decks +17% synergy
Lazav, Dimir Mastermind
17% of 23 decks +17% synergy
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17% of 23 decks +17% synergy
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17% of 23 decks +17% synergy
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17% of 23 decks +16% synergy
Notion Thief
17% of 23 decks +8% synergy
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14% of 22 decks +5% synergy
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13% of 23 decks +13% synergy
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13% of 23 decks +13% synergy
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13% of 23 decks +12% synergy
Deadeye Navigator
13% of 23 decks +10% synergy
Phantasmal Image
13% of 23 decks +8% synergy
Spark Double
13% of 23 decks +8% synergy
Kambal, Consul of Allocation
13% of 23 decks +7% synergy
Grand Abolisher
13% of 23 decks +1% synergy
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13% of 23 decks +1% synergy
Instants
Brainstorm
43% of 23 decks +24% synergy
Energy Arc
39% of 23 decks +39% synergy
Swords to Plowshares
39% of 23 decks -30% synergy
Void Rend
33% of 21 decks -0% synergy
Desertion
30% of 23 decks +30% synergy
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30% of 23 decks +12% synergy
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26% of 23 decks +26% synergy
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26% of 23 decks +22% synergy
Refocus
22% of 23 decks +22% synergy
Cloudshift
22% of 23 decks +19% synergy
Ghostly Flicker
22% of 23 decks +19% synergy
Mortify
22% of 23 decks +11% synergy
Enlightened Tutor
22% of 23 decks -1% synergy
Cyclonic Rift
22% of 23 decks -7% synergy
Path to Exile
22% of 23 decks -22% synergy
Twiddle
17% of 23 decks +17% synergy
Cerulean Wisps
17% of 23 decks +17% synergy
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17% of 23 decks -1% synergy
Despark
17% of 23 decks -2% synergy
Dovin's Veto
17% of 23 decks -9% synergy
An Offer You Can't Refuse
14% of 21 decks -9% synergy
Reins of Power
13% of 23 decks +13% synergy
Muddle the Mixture
13% of 23 decks +8% synergy
Return to Dust
13% of 23 decks +8% synergy
Force of Will
13% of 23 decks +0% synergy
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Swan Song
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Arcane Denial
13% of 23 decks -7% synergy
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Sorceries
Bribery
39% of 23 decks +38% synergy
Supreme Verdict
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Diabolic Tutor
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Mithril Coat
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Ashnod's Altar
17% of 23 decks +9% synergy
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Sensei's Divining Top
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Talisman of Dominance
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Lands
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Drowned Catacomb
52% of 23 decks +26% synergy
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Prairie Stream
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Godless Shrine
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Exotic Orchard
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39% of 23 decks +20% synergy
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35% of 23 decks +8% synergy
Sunken Hollow
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Dismal Backwater
22% of 23 decks +14% synergy
Tranquil Cove
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Concealed Courtyard
17% of 23 decks +13% synergy
Scoured Barrens
17% of 23 decks +9% synergy
Port Town
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Flooded Strand
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Marsh Flats
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Deserted Beach
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Shipwreck Marsh
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Vault of Champions
14% of 22 decks -20% synergy
Sejiri Refuge
13% of 23 decks +11% synergy
Jwar Isle Refuge
13% of 23 decks +11% synergy
Fetid Pools
13% of 23 decks +9% synergy
Fetid Heath
13% of 23 decks +5% synergy
Skycloud Expanse
13% of 23 decks -1% synergy
Choked Estuary
13% of 23 decks -4% synergy
Adarkar Wastes
13% of 23 decks -10% synergy
Polluted Delta
13% of 23 decks -19% synergy