Tetravus + Time Sieve + Doubling Season

Prerequisites

• Tetravus has at least one +1/+1 counter on it.

Steps

1. 1At the beginning of your upkeep, Tetravus triggers twice.
2. 2If Tetravus has fewer than four +1/+1 counters on it, follow these steps; otherwise, skip to step 7.
3. 3Resolve the token making ability, removing all +1/+1 counters from Tetravus and creating twice that many Tetravite tokens.
4. 4Resolve the token exiling ability, exiling those tokens and putting twice that many +1/+1 counters on Tetravus.
5. 5Move to your next turn.
6. 6At the beginning of your upkeep, Tetravus triggers twice.
7. 7Resolve the token making ability, removing at least four +1/+1 counters and creating at least eight Tetravite tokens.
8. 8Activate Time Sieve by sacrificing five Tetravite tokens, granting you an extra turn after this one.
9. 9Resolve the token exiling ability, exiling at least three Tetravite tokens.
10. 10Repeat from step 5.

Effects

• Infinite turns
• Lock