Yenna, Redtooth Regent + Three Blind Mice + Doubling Season

Yenna, Redtooth Regent

Three Blind Mice

Doubling Season

How it works

1. Activate Yenna by paying 2 and tapping it, creating two token copies of Three Blind Mice.
2. The Three Blind Mice tokens enter the battlefield with two lore counters on them due to Doubling Season, triggering their first and second chapter abilities.
3. Resolve the first Three Blind Mice triggers, creating four 1/1 Mouse creature tokens.
4. Resolve the next Three Blind Mice trigger, creating two token copies of a Three Blind Mice token.
5. Repeat from step 2.
6. Once you have infinite Three Blind Mice triggers, you may use them to copy any token(s) you control.

This clever loop turns Yenna, Redtooth Regent into an infinite replication engine by exploiting how copy and replacement effects interact with Sagas. When Yenna taps to copy Three Blind Mice, Doubling Season doubles the resulting enchantment tokens *and* immediately doubles the lore counters placed on them as they enter. This causes the newly spawned Sagas to instantly jump to their later chapters, using their second-chapter ability to copy other tokens—including more copies of Three Blind Mice—while also fueling an endless army of 1/1 Mice.