Umbral Mantle, Task Force, and Worthy Cause

Prerequisites

• Umbral Mantle on the battlefield
• Task Force on the battlefield
• Worthy Cause in hand
• available

Steps

1. Activate Umbral Mantle's equip ability by paying , targeting Task Force
2. Task Force triggers, giving itself +0/+3 until end of turn
3. Resolve the Umbral Mantle ability, attaching it to Task Force
4. Repeat from step 1 an arbitrarily large number of times
5. Cast Worthy Cause by paying and by sacrificing Task Force, causing you to gain life equal to Task Force's toughness

Results

• Infinite lifegain