The Tenth Doctor + Mana Echoes + Venture Forth + Rite of the Dragoncaller

The Tenth Doctor

Mana Echoes

Venture Forth

Rite of the Dragoncaller

How it works

1. Activate The Tenth Doctor by paying 7, removing all time counters from Venture Forth.
2. Venture Forth 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 Venture Forth.
6. Repeat.

This fascinating temporal loop begins by using The Tenth Doctor's hefty time travel ability to strip the time counters off an exiled Venture Forth, forcing you to cast it for free and sending it right back into suspension. Every iteration of this spellcasting triggers Rite of the Dragoncaller to birth a flying Dragon token, which in turn supercharges Mana Echoes to generate more than enough colorless mana to fund your next Timey-Wimey activation. Because Venture Forth dumps every land from your library straight onto the battlefield before re-exiling itself to repeat the cycle, you flood the board with lands and tokens while generating an endless engine of triggers.