Agatha of the Vile Cauldron + Cogwork Assembler + Thran Dynamo

Agatha of the Vile Cauldron

Cogwork Assembler

Thran Dynamo

How it works

1. Activate Cogwork Assembler by paying at most 3, creating a token copy of Thran Dynamo.
2. Activate the Thran Dynamo token by tapping it, adding CCC.
3. Repeat.
4. If Agatha of the Vile Cauldron has power 5 or greater, this combo nets infinite mana and you can then target any other artifact(s) using Cogwork Assembler.

By leveraging Agatha of the Vile Cauldron, you offset the hefty activation cost of Cogwork Assembler so that it only costs three mana to run. With this discount in place, Cogwork Assembler can target and duplicate Thran Dynamo over and over, since each new Thran Dynamo token taps for three colorless mana to completely fund the next activation. This self-sustaining loop quickly generates infinite colorless mana, after which you can redirect Cogwork Assembler's copies toward any other artifacts on your battlefield to flood the board.