Myr Welder, Seedcradle Witch, and Nyx Lotus

Prerequisites

• Myr Welder on the battlefield
• Seedcradle Witch on the battlefield
• Nyx Lotus in exile

Steps

1. Activate Myr Welder using Nyx Lotus's ability by tapping it, adding at least
2. Activate Seedcradle Witch by paying , untapping Myr Welder and giving it +3/+3 until end of turn
3. Repeat

Results

• Infinite mana of colors you have devotion to
• Infinitely large creature until end of turn