Yedora, Grave Gardener, Proteus Machine, and Starved Rusalka

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Proteus Machine on the battlefield
• Starved Rusalka on the battlefield
• available

Steps

1. Activate Starved Rusalka by paying and sacrificing Proteus Machine
2. When Proteus Machine dies, Yedora triggers, returning Proteus Machine to the battlefield face down as a Forest land
3. Resolve the Starved Rusalka ability, causing you to gain 1 life
4. Activate Proteus Machine by tapping it, adding
5. Activate Proteus Machine's morph ability by paying , turning it face up
6. Repeat

Results

• Infinite death triggers
• Infinite landfall triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers