Yedora, Grave Gardener + Phyrexian Altar + Watcher of the Roost

Prerequisites

• You have at least one white card in hand.

Steps

1. 1Activate Phyrexian Altar by sacrificing Watcher of the Roost, adding one mana of any color.
2. 2When Watcher of the Roost dies, Yedora triggers, returning Watcher of the Roost from your graveyard to the battlefield face down as a Forest land.
3. 3Activate Watcher of the Roost's morph ability by revealing a white card from your hand, turning it face up.
4. 4Watcher of the Roost triggers, causing you to gain 2 life.
5. 5Repeat.

Effects

• Infinite colored mana
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers
• Infinite lifegain
• Infinite lifegain triggers