Mikaeus, the Unhallowed + Phyrexian Altar + River Kelpie

Prerequisites

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Steps

1. 1Activate Phyrexian Altar by sacrificing River Kelpie.
2. 2When River Kelpie dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. 3When River Kelpie enters, its first ability triggers, causing you to draw a card.
4. 4Activate Phyrexian Altar by sacrificing River Kelpie.
5. 5When River Kelpie dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. 6When River Kelpie enters, its first ability triggers, causing you to draw a card.
7. 7Repeat.

Effects

• Infinite card draw
• Infinite draw triggers
• Near-infinite colored mana
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers