Urza, Lord High Artificer + Animation Module + Machinesmith Automaton

Urza, Lord High Artificer

Animation Module

Machinesmith Automaton

How it works

1. Cast Animation Module by paying 1.
2. When Animation Module enters, Machinesmith Automaton triggers, putting a +1/+1 counter on it.
3. Animation Module triggers. Holding priority, activate Urza's first ability by tapping an artifact you control, adding .
4. Resolve the Animation Module trigger, causing you to pay 1 to create a 1/1 Servo artifact creature token.
5. When the Servo enters, Machinesmith Automaton triggers, putting a +1/+1 counter on it.
6. Repeat from step 3.