Biotransference + Empowered Autogenerator + Merrow Grimeblotter + Myr Welder

Mana needed: {1} (at most)

UB identity

Commander legal

The 4 combo pieces

• Biotransference
• Empowered Autogenerator
• Merrow Grimeblotter
• Myr Welder

What must be in place

Myr Welder does not have summoning sickness.

How to execute it

1. Activate Myr Welder using Empowered Autogenerator's ability by tapping it, putting a charge counter on Myr Welder and adding {U} or {B} for each charge counter on Myr Welder.
2. Activate Myr Welder using Merrow Grimeblotter's ability by paying {1}{U/B} and untapping it, giving target creature -2/-0 until end of turn.
3. Repeat.

What the combo produces

• Infinite charge counters on a permanent
• Infinite colored mana