Nim Deathmantle + Phyrexian Altar + Darksteel Splicer

Nim Deathmantle

Phyrexian Altar

Darksteel Splicer

How it works

1. Activate Phyrexian Altar by sacrificing Darksteel Splicer, adding 1.
2. When Darksteel Splicer dies, Nim Deathmantle triggers, causing you to pay 4 to return Darksteel Splicer from your graveyard to the battlefield, and attach Nim Deathmantle to it.
3. When Darksteel Splicer enters the battlefield, it triggers, creating at least one 3/3 Phyrexian Golem artifact creature token.
4. Activate Phyrexian Altar three times by sacrificing three Phyrexian Golems, adding 3.
5. Repeat.
6. If you have four or more opponents, this combo nets infinite creature tokens and colored mana.

This ingenious loop turns Darksteel Splicer and its metallic brood into an endless engine of sacrifice and resurrection, provided you have at least four opponents to fuel the arithmetic. By feeding the Splicer and the tokens it creates to Phyrexian Altar, you generate the exact mana needed to pay Nim Deathmantle's revival cost every time a nontoken creature hits the graveyard. Each cycle brings the Splicer back to the battlefield to manufacture a fresh batch of 3/3 Golems, netting you an unstoppable surplus of mana and sacrifices along the way.