Adarkar Valkyrie
Intruder Alarm
Phyrexian Altar

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
Adarkar Valkyrie does not have summoning sickness. You control at least one additional nontoken creature.

   Steps

How does this combo work?
1
Activate Adarkar Valkyrie by tapping it, targeting another nontoken creature you control.
2
Activate Phyrexian Altar by sacrificing the creature targeted in step 1, adding one mana of any color.
3
When the creature dies, Adarkar Valkyrie triggers, returning the sacrificed creature from your graveyard to the battlefield.
4
When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite colored mana
Infinite sacrifice triggers
Infinite death triggers
Infinite untap of creatures
Infinite mana creatures you control can produce
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