Scuttling Sliver, Trazyn the Infinite, Amoeboid Changeling, and Arc Reactor

Prerequisites

• Scuttling Sliver on the battlefield
• Trazyn the Infinite on the battlefield
• Amoeboid Changeling on the battlefield
• Arc Reactor in the graveyard

Steps

1. Activate Amoeboid Changeling by tapping it, causing Trazyn to gain all creature types until end of turn Activate Trazyn using Arc Reactor's ability by tapping it, adding Activate Trazyn by paying , untapping it
2. Repeat from step 2

Results

• Infinite colorless mana
• Infinite untap of some creatures you control