Careful Cultivation + Umbral Mantle + Biomancer's Familiar

Prerequisites

• Umbral Mantle and Careful Cultivation attached to the same creature you control that does not have summoning sickness.

Steps

1. 1Activate the creature with Careful Cultivation and Umbral Mantle attached by tapping it, adding .
2. 2Activate the creature by paying and untapping it, causing it to get +2/+2 until end of turn.
3. 3Repeat.

Effects

• Infinite green mana
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control
• Infinitely large creature until end of turn