Etali, Primal Conqueror
Mortuary
Altar of Dementia

   Prerequisites

What do I need to start this combo?
Etali in hand.
Mortuary and Altar of Dementia on the battlefield.
5 available

   Steps

How does this combo work?
1
Cast Etali by paying 5.
2
When Etali enters the battlefield, it triggers.
3
Holding priority, activate Altar of Dementia by sacrificing Etali.
4
When Etali dies Mortuary triggers, putting Etali on top of your library from your graveyard.
5
Resolve the Altar of Dementia ability from Step 3, ensure that you do not target yourself.
6
Resolve the Etali trigger from step 2, causing you to exile cards from each player's library until you exile a nonland card, with you exiling Etali from your library.
7
Cast Etali and any other nonland cards exiled this way without paying their mana costs.
8
Repeat from Step 2.

   Results

What do I get from this combo?
Cast any number of spells from opponents' libraries
Exile each opponent's library
Infinite ETB
Infinite LTB
Infinite death triggers
Infinite mill
Infinite sacrifice triggers
Infinite self-mill
Infinite storm count
Near-infinite magecraft triggers
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