The Tenth Doctor + Mana Echoes + Venture Forth + Deekah, Fractal Theorist

The Tenth Doctor

Mana Echoes

Venture Forth

Deekah, Fractal Theorist

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. Deekah 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 engine relies on rapidly manipulating time counters and card types to loop a single sorcery indefinitely. You kick things off by using The Tenth Doctor's Timey-Wimey ability to strip the final time counters off an exiled Venture Forth, forcing you to cast it for free. As Venture Forth is cast, Deekah, Fractal Theorist triggers its magecraft ability to drop a massive Fractal token onto the board, which in turn immediately wakes up Mana Echoes to flood your pool with colorless mana based on the sharing of creature types. Since Venture Forth naturally suspends itself again upon resolution—and since its own effect puts all your lands onto the battlefield—you gain a compounding engine of near-infinite landfall triggers, creature tokens, and mana to fund The Tenth Doctor's next reset.