Oloro, Ageless Ascetic + Nadir Kraken + Ashnod's Altar + Overgrowth Elemental

Oloro, Ageless Ascetic

Nadir Kraken

Ashnod's Altar

Overgrowth Elemental

How it works

1. Draw a card.
2. Nadir Kraken triggers, causing you to pay 1 to put a +1/+1 counter on it and create a 1/1 Tentacle creature token.
3. When the Tentacle enters the battlefield, Overgrowth Elemental's second ability triggers, causing you to gain 1 life.
4. Oloro's second ability triggers.
5. Holding prioirty, activate Ashnod's Altar by sacrificing the Tentacle, adding CC.
6. Resolve the Oloro trigger, causing you to pay 1 to draw a card and cause each opponent to lose 1 life.
7. Repeat.

This clever loop feeds entirely on its own momentum, starting the moment you draw a card to trigger Nadir Kraken. As Nadir Kraken creates a Tentacle token, Overgrowth Elemental's second ability notices the creature entering and rewards you with life, which in turn triggers Oloro, Ageless Ascetic to let you pay a single mana to draw another card and drain your opponents. Meanwhile, Ashnod's Altar stands ready to sacrifice that very same Tentacle token, converting it back into the colorless mana you need to pay for Nadir Kraken and Oloro, Ageless Ascetic's ongoing costs.