Pentavus + Necrosynthesis + Ashnod's Altar
Pentavus
Necrosynthesis
Ashnod's Altar
Requires
Pentavus must be on the battlefield.
Necrosynthesis must be on the battlefield.
Ashnod's Altar must be on the battlefield.
Necrosynthesis attached to Pentavus.
Pentavus has at least two +1/+1 counters on it.
Mana needed: 
Steps
- Activate Pentavus' first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Pentavite creature token.
- Activate Ashnod's Altar by sacrificing the Pentavite, adding .
- The Pentavite dies, triggering Pentavus, putting a +1/+1 counter on itself.
- Repeat.
Results
Infinite colorless mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.
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