Requires

Gilder Bairn must be on the battlefield. Cryptic Trilobite must be on the battlefield. Paradise Mantle must be on the battlefield. Cryptic Trilobite has at least two +1/+1 counters on it. Gilder Bairn does not have summoning sickness. Paradise Mantle attached to Gilder Bairn. Mana needed:

Steps

1. Activate Gilder Bairn by tapping it, adding .
2. Activate Gilder Bairn by paying and untapping it, doubling each counter on Cryptic Trilobite.
3. Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding that can only be spent to activate abilities.
4. Repeat.
5. Once you have infinite +1/+1 counters on Cryptic Trilobite, you may instead double the counters on any other permanent(s).

Results