Araumi of the Dead Tide + Specimen Collector + Phyrexian Altar

Araumi of the Dead Tide

Specimen Collector

Phyrexian Altar

How it works

1. Activate Araumi by tapping it and exiling a number of cards equal to the number of opponent you have, giving Specimen Collector encore until end of turn.
2. Activate Specimen Collector's encore ability by paying 4 and exiling it, creating at least two token copies of it with haste.
3. Each Specimen Collector enters the battlefield, creating that many 1/1 Squirrel and 0/3 Crab creature tokens.
4. Activate Phyrexian Altar by sacrificing a Specimen Collector token, adding one mana of any color.
5. The Specimen Collector token dies, creating a token copy of a Specimen Collector token.
6. Repeat from step 3.