Colfenor, the Last Yew
Gutter Grime
Phyrexian Altar

   Prerequisites

What do I need to start this combo?
Creature castable for 0 in hand.
All other permanents on the battlefield.
Gutter Grime has slime counters on it at least equal to the toughness of the creature card in your hand.

   Steps

How does this combo work?
1
Cast the creature card in your hand by paying 0.
2
Either that creature dies as a state-based action due to having zero toughness, or activate Phyrexian Altar by sacrificing that creature, adding one mana of any color.
3
Gutter Grime triggers, putting a slime counter on it and creating a X/X Ooze creature token.
4
Activate Phyrexian Altar by sacrificing the Ooze, adding one mana of any color.
5
When the Ooze dies, Colfenor triggers, returning the creature card from your graveyard to your hand.
6
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite colored mana
Infinite sacrifice triggers
Infinite death triggers
Infinite storm count
Infinite creature tokens that are infinitely large
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