The Tenth Doctor + Mana Echoes + Festering March + Rite of the Dragoncaller

The Tenth Doctor

Mana Echoes

Festering March

Rite of the Dragoncaller

How it works

1. Activate The Tenth Doctor by paying 7, removing all time counters from Festering March.
2. Festering March triggers, causing you to cast it from exile without paying its mana cost.
3. Rite of the Dragoncaller triggers, creating a creature token.
4. When the creature token enters, Mana Echoes triggers, adding C for each creature you control that shares a creature type with the token.
5. Resolve Festering March.
6. Repeat.

This clever loop transforms The Tenth Doctor's unique time-travel ability into an unstoppable engine by exploiting Festering March as a self-exiling, recurrent spell. Every time you accelerate Festering March out of exile, Rite of the Dragoncaller rewards you by hatching a 5/5 Dragon token. Because these tokens share a creature type, Mana Echoes floods your mana pool with colorless energy with each new arrival, more than funding the {7} activation cost needed to tick the March right back down to zero counters.