Mairsil, the Pretender + Sage of Hours + Anthroplasm

Mairsil, the Pretender

Sage of Hours

Anthroplasm

How it works

1. Activate Mairsil using Anthroplasm's ability by paying 5 and tapping it, removing all +1/+1 counters and putting five +1/+1 counters on Mairsil.
2. Activate Mairsil using Sage of Hours's ability by removing five +1/+1 counters, gaining an extra turn after this one.
3. Move to your next turn.
4. Repeat.