Royal Assassin + Frozen Aether + Intruder Alarm

Royal Assassin
Frozen Aether
Intruder Alarm

Requires
Royal Assassin must be on the battlefield. Frozen Aether must be on the battlefield. Intruder Alarm must be on the battlefield. Royal Assassin does not have summoning sickness.
Steps
  1. Whenever a creature enters the battlefield under an opponent's control, it enters tapped due to Frozen Aether and triggers Intruder Alarm.
  2. Holding priority, activate Royal Assassin by tapping it, destroying the creature.
  3. Resolve the Intruder Alarm trigger, untapping all creatures.
  4. Repeat.
Results
Destroy all creatures that enter the battlefield under an opponent's control.

Merieke Ri Berit
0.11% of 1860 decks 2 decks
Ramses, Assassin Lord
0.09% of 2267 decks 2 decks
Archelos, Lagoon Mystic
0.03% of 3405 decks 1 decks
Wilhelt, the Rotcleaver
0.01% of 19009 decks 1 decks
Ezio, Blade of Vengeance
0.25% of 394 decks 1 decks
Anowon, the Ruin Thief
0.01% of 6676 decks 1 decks
Oona, Queen of the Fae
0.05% of 1863 decks 1 decks
High Synergy Cards
Murder
44% of 9 decks +41% synergy
Notion Thief
44% of 9 decks +37% synergy
Bojuka Bog
56% of 9 decks +25% synergy
Rogue's Passage
44% of 9 decks +25% synergy
Negate
44% of 9 decks +22% synergy
Top Cards
Commander's Sphere
44% of 9 decks +29% synergy
Counterspell
44% of 9 decks +2% synergy
Creatures
Assassin Den
100% of 1 decks +100% synergy
Argothian Elder
100% of 1 decks +100% synergy
Voyaging Satyr
100% of 1 decks +100% synergy
Brotherhood Spy
100% of 1 decks +99% synergy
Magus of the Candelabra
100% of 1 decks +99% synergy
Maraleaf Pixie
100% of 1 decks +98% synergy
Desmond Miles
100% of 2 decks +98% synergy
Thrasios, Triton Hero
100% of 1 decks +98% synergy
Fauna Shaman
100% of 1 decks +97% synergy
Arixmethes, Slumbering Isle
100% of 1 decks +97% synergy
Achilles Davenport
100% of 2 decks +97% synergy
Saryth, the Viper's Fang
100% of 1 decks +96% synergy
Pippin, Guard of the Citadel
100% of 1 decks +96% synergy
Murkfiend Liege
100% of 1 decks +96% synergy
Kiora's Follower
100% of 1 decks +94% synergy
Drana and Linvala
100% of 1 decks +94% synergy
Arbor Elf
100% of 1 decks +94% synergy
Bloom Tender
100% of 1 decks +92% synergy
Seedborn Muse
100% of 1 decks +92% synergy
Fyndhorn Elves
100% of 1 decks +87% synergy
Elvish Mystic
100% of 1 decks +82% synergy
The Ever-Changing 'Dane
50% of 2 decks +50% synergy
Strict Proctor
50% of 2 decks +50% synergy
Adarkar Valkyrie
50% of 2 decks +49% synergy
Eidolon of Rhetoric
50% of 2 decks +48% synergy
Unsettled Mariner
50% of 2 decks +48% synergy
Drumbellower
50% of 2 decks +48% synergy
Ezio, Blade of Vengeance
50% of 2 decks +48% synergy
Vein Ripper
50% of 2 decks +48% synergy
Weathered Wayfarer
50% of 2 decks +47% synergy
Lydia Frye
50% of 2 decks +47% synergy
Adéwalé, Breaker of Chains
50% of 2 decks +47% synergy
Grand Arbiter Augustin IV
50% of 2 decks +46% synergy
Zur the Enchanter
50% of 2 decks +46% synergy
Basim Ibn Ishaq
50% of 2 decks +45% synergy
Drannith Magistrate
50% of 2 decks +43% synergy
Mother of Runes
50% of 2 decks +43% synergy
Esper Sentinel
50% of 2 decks +29% synergy
Aven Heartstabber
38% of 8 decks +37% synergy
Mari, the Killing Quill
38% of 8 decks +36% synergy
Guul Draz Assassin
33% of 9 decks +33% synergy
Stingblade Assassin
33% of 3 decks +33% synergy
Nekrataal
33% of 9 decks +33% synergy
Thorn of the Black Rose
33% of 9 decks +33% synergy
Virtus the Veiled
33% of 9 decks +33% synergy
Forensic Researcher
33% of 3 decks +33% synergy
Kelpie Guide
33% of 9 decks +32% synergy
Etrata, the Silencer
33% of 9 decks +32% synergy
Arcanis the Omnipotent
33% of 9 decks +32% synergy
Etrata, Deadly Fugitive
33% of 3 decks +32% synergy
Instants
Void Rend
100% of 2 decks +85% synergy
Return to Dust
50% of 2 decks +46% synergy
Mortify
50% of 2 decks +38% synergy
Despark
50% of 2 decks +34% synergy
Enlightened Tutor
50% of 2 decks +32% synergy
Dovin's Veto
50% of 2 decks +31% synergy
Teferi's Protection
50% of 2 decks +30% synergy
Path to Exile
50% of 2 decks +4% synergy
Swords to Plowshares
50% of 2 decks -13% synergy
Hero's Downfall
33% of 9 decks +31% synergy
Mana Drain
33% of 9 decks +18% synergy
Cyclonic Rift
33% of 9 decks +6% synergy
Stern Scolding
25% of 4 decks +24% synergy
Borne Upon a Wind
25% of 4 decks +21% synergy
Drown in the Loch
22% of 9 decks +16% synergy
Infernal Grasp
22% of 9 decks +15% synergy
Opt
22% of 9 decks +13% synergy
Vampiric Tutor
22% of 9 decks +4% synergy
Arcane Denial
22% of 9 decks +3% synergy
Brainstorm
22% of 9 decks +1% synergy
Dark Ritual
22% of 9 decks -0% synergy
Prologue to Phyresis
17% of 6 decks +15% synergy
Vraska's Fall
17% of 6 decks +14% synergy
Experimental Augury
17% of 6 decks +14% synergy
Assassin's Ink
12% of 8 decks +12% synergy
An Offer You Can't Refuse
12% of 8 decks -8% synergy
Contagion
11% of 9 decks +11% synergy
Eliminate
11% of 9 decks +11% synergy
Vendetta
11% of 9 decks +11% synergy
Silumgar's Command
11% of 9 decks +11% synergy
Tyrant's Scorn
11% of 9 decks +11% synergy
Undermine
11% of 9 decks +11% synergy
Cast Down
11% of 9 decks +10% synergy
Erebos's Intervention
11% of 9 decks +10% synergy
Unsummon
11% of 9 decks +10% synergy
Soul Manipulation
11% of 9 decks +10% synergy
Didn't Say Please
11% of 9 decks +10% synergy
Memory Lapse
11% of 9 decks +10% synergy
Shadow Rift
11% of 9 decks +10% synergy
Tainted Strike
11% of 9 decks +9% synergy
Countersquall
11% of 9 decks +9% synergy
Blue Sun's Zenith
11% of 9 decks +8% synergy
Dismember
11% of 9 decks +8% synergy
Dramatic Reversal
11% of 9 decks +6% synergy
Aetherize
11% of 9 decks +6% synergy
Mental Misstep
11% of 9 decks +5% synergy
Fact or Fiction
11% of 9 decks +4% synergy
Go for the Throat
11% of 9 decks +4% synergy
Entomb
11% of 9 decks +4% synergy
Pact of Negation
11% of 9 decks +4% synergy
Sorceries
Villainous Wealth
100% of 1 decks +92% synergy
Damn
100% of 2 decks +84% synergy
Brilliant Ultimatum
50% of 2 decks +49% synergy
Slash the Ranks
50% of 2 decks +49% synergy
Back in Town
50% of 2 decks +48% synergy
Sevinne's Reclamation
50% of 2 decks +43% synergy
Raise the Palisade
33% of 3 decks +30% synergy
Diabolic Tutor
33% of 9 decks +27% synergy
Ringsight
25% of 4 decks +20% synergy
Crippling Fear
22% of 9 decks +20% synergy
Profane Tutor
22% of 9 decks +19% synergy
Damnation
22% of 9 decks +14% synergy
Windfall
22% of 9 decks +9% synergy
Demonic Tutor
22% of 9 decks +0% synergy
Annihilating Glare
17% of 6 decks +16% synergy
Drown in Ichor
17% of 6 decks +14% synergy
Infectious Inquiry
17% of 6 decks +14% synergy
Blood Money
12% of 8 decks +10% synergy
Infinite Obliteration
11% of 9 decks +11% synergy
Psychic Intrusion
11% of 9 decks +11% synergy
Dirge of Dread
11% of 9 decks +11% synergy
Consuming Vapors
11% of 9 decks +11% synergy
Cruel Tutor
11% of 9 decks +11% synergy
Death Cloud
11% of 9 decks +11% synergy
Mass Diminish
11% of 9 decks +11% synergy
Wash Out
11% of 9 decks +10% synergy
Sleep
11% of 9 decks +10% synergy
Bone Splinters
11% of 9 decks +10% synergy
Beseech the Queen
11% of 9 decks +10% synergy
Beacon of Unrest
11% of 9 decks +10% synergy
Bribery
11% of 9 decks +10% synergy
Bubbling Muck
11% of 9 decks +10% synergy
Bone Shards
11% of 9 decks +10% synergy
Peer into the Abyss
11% of 9 decks +8% synergy
Rite of Replication
11% of 9 decks +8% synergy
Rise of the Dark Realms
11% of 9 decks +8% synergy
Grim Tutor
11% of 9 decks +7% synergy
Torment of Hailfire
11% of 9 decks +6% synergy
Buried Alive
11% of 9 decks +6% synergy
Exsanguinate
11% of 9 decks +5% synergy
Imperial Seal
11% of 9 decks +5% synergy
Reanimate
11% of 9 decks -5% synergy
Utility Artifacts
Brotherhood Regalia
100% of 1 decks +95% synergy
Thornbite Staff
33% of 9 decks +33% synergy
Sting, the Glinting Dagger
33% of 3 decks +32% synergy
Vorpal Sword
33% of 9 decks +32% synergy
Thousand-Year Elixir
33% of 9 decks +31% synergy
Swiftfoot Boots
33% of 9 decks +5% synergy
Magewright's Stone
22% of 9 decks +22% synergy
Quietus Spike
22% of 9 decks +21% synergy
Teferi's Puzzle Box
22% of 9 decks +21% synergy
Lithoform Engine
22% of 9 decks +21% synergy
Staff of Domination
22% of 9 decks +20% synergy
Coat of Arms
22% of 9 decks +20% synergy
Altar of Dementia
22% of 9 decks +19% synergy
Lightning Greaves
22% of 9 decks -3% synergy
Unlicensed Hearse
12% of 8 decks +12% synergy
Sands of Time
11% of 9 decks +11% synergy
Kill Switch
11% of 9 decks +11% synergy
Aeon Engine
11% of 9 decks +11% synergy
Orb of Dreams
11% of 9 decks +11% synergy
Mindlock Orb
11% of 9 decks +11% synergy
Glaring Spotlight
11% of 9 decks +11% synergy
Animation Module
11% of 9 decks +11% synergy
Heartstone
11% of 9 decks +11% synergy
Meekstone
11% of 9 decks +11% synergy
Blasting Station
11% of 9 decks +11% synergy
Obelisk of Urd
11% of 9 decks +10% synergy
Mirrorworks
11% of 9 decks +10% synergy
God-Pharaoh's Statue
11% of 9 decks +10% synergy
Mycosynth Lattice
11% of 9 decks +10% synergy
Amulet of Vigor
11% of 9 decks +10% synergy
Tormod's Crypt
11% of 9 decks +10% synergy
Altar of the Brood
11% of 9 decks +10% synergy
Illusionist's Bracers
11% of 9 decks +10% synergy
Mesmeric Orb
11% of 9 decks +10% synergy
Blade of Selves
11% of 9 decks +10% synergy
Darksteel Plate
11% of 9 decks +10% synergy
Rings of Brighthearth
11% of 9 decks +9% synergy
Mindcrank
11% of 9 decks +9% synergy
Conjurer's Closet
11% of 9 decks +9% synergy
Crucible of Worlds
11% of 9 decks +9% synergy
Unwinding Clock
11% of 9 decks +8% synergy
Jet Medallion
11% of 9 decks +8% synergy
Expedition Map
11% of 9 decks +8% synergy
Strionic Resonator
11% of 9 decks +8% synergy
Whispersilk Cloak
11% of 9 decks +7% synergy
Phyrexian Altar
11% of 9 decks +7% synergy
Vanquisher's Banner
11% of 9 decks +7% synergy
Wishclaw Talisman
11% of 9 decks +6% synergy
Sensei's Divining Top
11% of 9 decks +6% synergy
Herald's Horn
11% of 9 decks +5% synergy
Enchantments
Market Festival
100% of 1 decks +100% synergy
Dawn's Reflection
100% of 1 decks +100% synergy
The Revelations of Ezio
100% of 1 decks +99% synergy
Quest for Renewal
100% of 1 decks +99% synergy
Concordant Crossroads
100% of 1 decks +97% synergy
Cryptolith Rite
100% of 1 decks +97% synergy
Fertile Ground
100% of 1 decks +96% synergy
Utopia Sprawl
100% of 1 decks +92% synergy
Wild Growth
100% of 1 decks +89% synergy
Ghostly Prison
100% of 2 decks +88% synergy
Reprobation
50% of 2 decks +49% synergy
Double Down
50% of 2 decks +49% synergy
Rule of Law
50% of 2 decks +48% synergy
Smuggler's Share
50% of 2 decks +48% synergy
Aura of Silence
50% of 2 decks +48% synergy
Rooftop Bypass
50% of 2 decks +47% synergy
Sphere of Safety
50% of 2 decks +45% synergy
Land Tax
50% of 2 decks +43% synergy
Blind Obedience
50% of 2 decks +43% synergy
Smothering Tithe
50% of 2 decks +25% synergy
Pemmin's Aura
33% of 9 decks +32% synergy
Blanket of Night
22% of 9 decks +22% synergy
Freed from the Real
22% of 9 decks +20% synergy
Training Grounds
22% of 9 decks +19% synergy
Kindred Discovery
22% of 9 decks +15% synergy
Mystic Remora
22% of 9 decks +4% synergy
Rhystic Study
22% of 9 decks -5% synergy
Necrogen Communion
17% of 6 decks +16% synergy
Witness Protection
12% of 8 decks +11% synergy
Black Market Connections
12% of 8 decks +1% synergy
Second Wind
11% of 9 decks +11% synergy
Ensoul Artifact
11% of 9 decks +11% synergy
Mortuary
11% of 9 decks +11% synergy
Scuttletide
11% of 9 decks +11% synergy
Dauthi Embrace
11% of 9 decks +11% synergy
Dire Undercurrents
11% of 9 decks +11% synergy
Contamination
11% of 9 decks +11% synergy
Diplomatic Immunity
11% of 9 decks +11% synergy
Kasmina's Transmutation
11% of 9 decks +10% synergy
Telepathy
11% of 9 decks +10% synergy
Opposition
11% of 9 decks +10% synergy
Back to Basics
11% of 9 decks +10% synergy
Leyline of the Void
11% of 9 decks +10% synergy
Frogify
11% of 9 decks +10% synergy
Oubliette
11% of 9 decks +10% synergy
Underworld Connections
11% of 9 decks +10% synergy
Favorable Winds
11% of 9 decks +10% synergy
Cover of Darkness
11% of 9 decks +10% synergy
Rooftop Storm
11% of 9 decks +9% synergy
Rogue Class
11% of 9 decks +9% synergy
Planeswalkers
Tyvar, Jubilant Brawler
100% of 1 decks +95% synergy
Dovin, Hand of Control
50% of 2 decks +49% synergy
Teferi, Who Slows the Sunset
50% of 2 decks +48% synergy
Vraska, Scheming Gorgon
11% of 9 decks +11% synergy
Kasmina, Enigmatic Mentor
11% of 9 decks +10% synergy
Karn, the Great Creator
11% of 9 decks +10% synergy
Liliana of the Dark Realms
11% of 9 decks +10% synergy
Ugin, the Spirit Dragon
11% of 9 decks +10% synergy
Tezzeret the Seeker
11% of 9 decks +9% synergy
Narset, Parter of Veils
11% of 9 decks +6% synergy
Utility Lands
Hissing Quagmire
100% of 1 decks +99% synergy
Hall of Heliod's Generosity
50% of 2 decks +43% synergy
Detection Tower
22% of 9 decks +22% synergy
Arcane Lighthouse
22% of 9 decks +21% synergy
Access Tunnel
22% of 9 decks +20% synergy
Academy Ruins
22% of 9 decks +17% synergy
Urborg, Tomb of Yawgmoth
22% of 9 decks +12% synergy
Reliquary Tower
22% of 9 decks -7% synergy
Takenuma, Abandoned Mire
12% of 8 decks +2% synergy
Everglades
11% of 9 decks +11% synergy
Skyline Cascade
11% of 9 decks +11% synergy
Lake of the Dead
11% of 9 decks +11% synergy
Lotus Field
11% of 9 decks +10% synergy
Vesuva
11% of 9 decks +10% synergy
Emergence Zone
11% of 9 decks +9% synergy
Maze of Ith
11% of 9 decks +8% synergy
Strip Mine
11% of 9 decks +8% synergy
High Market
11% of 9 decks +8% synergy
Minamo, School at Water's Edge
11% of 9 decks +7% synergy
Shizo, Death's Storehouse
11% of 9 decks +6% synergy
Mana Artifacts
Golgari Signet
100% of 1 decks +87% synergy
Simic Signet
100% of 1 decks +86% synergy
Sol Ring
89% of 9 decks +4% synergy
Arcane Signet
78% of 9 decks +6% synergy
Talisman of Progress
50% of 2 decks +27% synergy
Talisman of Hierarchy
50% of 2 decks +26% synergy
Azorius Signet
50% of 2 decks +24% synergy
Dimir Signet
44% of 9 decks +15% synergy
Talisman of Dominance
33% of 9 decks +2% synergy
Patriar's Seal
25% of 8 decks +23% synergy
Thran Dynamo
22% of 9 decks +17% synergy
Fellwar Stone
22% of 9 decks +1% synergy
Relic of Legends
12% of 8 decks +10% synergy
Lotus Bloom
11% of 9 decks +11% synergy
Strixhaven Stadium
11% of 9 decks +11% synergy
Paradise Mantle
11% of 9 decks +10% synergy
Dimir Locket
11% of 9 decks +10% synergy
Dimir Keyrune
11% of 9 decks +10% synergy
Nyx Lotus
11% of 9 decks +10% synergy
Basalt Monolith
11% of 9 decks +8% synergy
Gilded Lotus
11% of 9 decks +8% synergy
Mox Amber
11% of 9 decks +7% synergy
Everflowing Chalice
11% of 9 decks +6% synergy
Mind Stone
11% of 9 decks -6% synergy
Lands
Simic Guildgate
100% of 1 decks +94% synergy
Thornwood Falls
100% of 1 decks +93% synergy
Tangled Islet
100% of 1 decks +93% synergy
Haunted Mire
100% of 1 decks +92% synergy
Jungle Hollow
100% of 1 decks +91% synergy
Azorius Chancery
100% of 2 decks +85% synergy
Golgari Rot Farm
100% of 1 decks +82% synergy
Simic Growth Chamber
100% of 1 decks +80% synergy
Glacial Fortress
100% of 2 decks +74% synergy
Opulent Palace
100% of 1 decks +73% synergy
Raffine's Tower
100% of 2 decks +72% synergy
Zagoth Triome
100% of 1 decks +69% synergy
Dimir Aqueduct
67% of 9 decks +50% synergy
Command Tower
67% of 9 decks -7% synergy
Tranquil Cove
50% of 2 decks +43% synergy
Scoured Barrens
50% of 2 decks +41% synergy
Orzhov Basilica
50% of 2 decks +34% synergy
Vault of Champions
50% of 2 decks +24% synergy
Sea of Clouds
50% of 2 decks +24% synergy
Isolated Chapel
50% of 2 decks +22% synergy
Arcane Sanctum
50% of 2 decks +22% synergy
Godless Shrine
50% of 2 decks +9% synergy
Hallowed Fountain
50% of 2 decks +9% synergy
Terramorphic Expanse
44% of 9 decks +29% synergy
Evolving Wilds
44% of 9 decks +24% synergy
Morphic Pool
44% of 9 decks +18% synergy
Sunken Hollow
44% of 9 decks +10% synergy
Watery Grave
44% of 9 decks +4% synergy
Drowned Catacomb
33% of 9 decks +8% synergy
Jwar Isle Refuge
22% of 9 decks +20% synergy
Sunken Ruins
22% of 9 decks +17% synergy
Dismal Backwater
22% of 9 decks +15% synergy
Fabled Passage
22% of 9 decks +13% synergy
Tainted Isle
22% of 9 decks +11% synergy
Darkwater Catacombs
22% of 9 decks +7% synergy
Temple of Deceit
22% of 9 decks +6% synergy
Choked Estuary
22% of 9 decks +6% synergy
Shipwreck Marsh
22% of 9 decks +3% synergy
Underground River
22% of 9 decks +3% synergy
Waterfront District
12% of 8 decks +11% synergy
Contaminated Aquifer
12% of 8 decks +9% synergy
Meteor Crater
11% of 9 decks +11% synergy
Esper Panorama
11% of 9 decks +11% synergy
Holdout Settlement
11% of 9 decks +11% synergy
Survivors' Encampment
11% of 9 decks +10% synergy
Vivid Marsh
11% of 9 decks +10% synergy
Vivid Creek
11% of 9 decks +10% synergy
Submerged Boneyard
11% of 9 decks +10% synergy
Darkslick Shores
11% of 9 decks +6% synergy
Clearwater Pathway
11% of 9 decks +1% synergy