Blossom Dryad, Gaea's Cradle, and Umbral Mantle

Prerequisites

• Blossom Dryad on the battlefield
• Gaea's Cradle on the battlefield
• Umbral Mantle on the battlefield
• Umbral Mantle attached to Blossom Dryad
• Blossom Dryad does not have summoning sickness
• You control at least four creatures

Steps

1. Activate Gaea's Cradle by tapping it, adding at least
2. Activate Blossom Dryad by tapping it, untapping Gaea's Cradle
3. Activate Blossom Dryad by paying and untapping it, giving itself +2/+2 until end of turn
4. Repeat

Results

• Infinitely large Blossom Dryad until end of turn
• Infinite mana lands you control can produce