Goblin Welder + Dross Scorpion + Biotransference

Prerequisites

• Goblin Welder does not have summoning sickness.
• You control at least one other nontoken artifact creature.
• You have at least one artifact creature card in your graveyard.

Steps

1. 1Activate Goblin Welder by tapping it, sacrificing any artifact creature you control and returning any other artifact creature from your graveyard to the battlefield.
2. 2The sacrificed creature dies, triggering Dross Scorpion, untapping Goblin Welder.
3. 3Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers