Xu-Ifit, Osteoharmonist
Intruder Alarm
Phyrexian Altar

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Xu-Ifit without summoning sickness on the battlefield).
You have a creature card in your graveyard

   Steps

How does this combo work?
1
Activate Xu-Ifit by tapping it, returning a creature card from your graveyard to the battlefield.
2
When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
3
Activate Phyrexian Altar by sacrificing the creature returned in step 1.
4
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite colored mana
Infinite sacrifice triggers
Infinite death triggers
Infinite mana creatures you control can produce
Infinite untap of creatures
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New Cards
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50%inclusion1 decks2 decks
50%synergy
High Synergy Cards
Altar of Dementia
80%inclusion8 decks10 decks
78%synergy
Ashnod's Altar
70%inclusion7 decks10 decks
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Gravecrawler
50%inclusion5 decks10 decks
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Urborg, Tomb of Yawgmoth
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Takenuma, Abandoned Mire
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31%synergy
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40%inclusion4 decks10 decks
31%synergy
Victimize
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28%synergy
Phyrexian Arena
40%inclusion4 decks10 decks
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Game Changers
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Creatures
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28%synergy
Fleshbag Marauder
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Carrion Feeder
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26%synergy
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Instants
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16%synergy
Sorceries
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Damnation
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Utility Artifacts
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Lightning Greaves
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Enchantments
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29%synergy
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Mana Artifacts
Sol Ring
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Arcane Signet
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Dimir Signet
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Talisman of Dominance
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8%synergy
Lands
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Watery Grave
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17%synergy
Morphic Pool
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16%synergy
Sunken Hollow
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6%synergy
Undercity Sewers
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19%synergy
Underground Sea
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15%synergy
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1%synergy