Halo Fountain
Phyrexian Altar
Karn, the Great Creator

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
Halo Fountain does not have summoning sickness.
available

   Steps

How does this combo work?
1
Activate Karn's first loyalty ability by putting a loyalty counter on it, causing Halo Fountain to become an artifact creature until end of turn.
2
Activate Halo Fountain's first ability by paying , tapping it and untapping it, creating a 1/1 Citizen creature token.
3
Activate Phyrexian Altar by sacrificing the Citizen, adding .
4
Repeat from step 2.

   Results

What do I get from this combo?
Infinite death triggers
Infinite ETB
Infinite LTB
Infinite sacrifice triggers
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