Seedcradle Witch + Bloom Tender + Prismwake Merrow

Prerequisites

• Bloom Tender does not have summoning sickness.

Steps

1. 1Cast Prismwake Merrow by paying .
2. 2Prismwake Merrow enters the battlefield, triggering itself, making a permanent you control all colors until end of turn.
3. 3Activate Bloom Tender by tapping it, adding .
4. 4Activate Seedcradle Witch by paying , giving Bloom Tender +3/+3 until end of turn and untapping it.
5. 5Repeat from step 3.

Effects

• Infinite black mana
• Infinite blue mana
• Infinite mana of colors among permanents you control
• Infinite red mana
• Infinitely large creature until end of turn