Ashnod's Altar + Great Oak Guardian Combos

6 known combos featuring both cards in Commander

Infinite death triggers Infinite ETB Infinite LTB Infinite sacrifice triggers Infinitely large creatures you control until end of turn

Combo 1 with Othelm, Sigardian Outcast

Results: Infinite death triggers · Infinite ETB · Infinite LTB · Infinite sacrifice triggers · Infinitely large creatures you control until end of turn · Infinite untap of creatures you control · Infinite mana creatures you control can produce
Steps
  1. Activate Ashnod's Altar by sacrificing Great Oak Guardian, adding {C}{C}.
  2. Activate Othelm by paying {2} and tapping it, returning Great Oak Guardian from your graveyard to the battlefield.
  3. Great Oak Guardian enters the battlefield, untapping all creatures you control and giving them +2/+2 until end of turn.
  4. Repeat.

Combo 2 with Yenna, Redtooth Regent + Jump Scare

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite untap of creatures you control · Infinite mana creatures you control can produce · Infinitely large creatures you control until end of turn
Show steps
  1. Cast Jump Scare by paying {W}, targeting Great Oak Guardian.
  2. Activate Yenna by paying {2} and tapping it, creating a token copy of Great Oak Guardian.
  3. When the Great Oak Guardian token enters, it triggers, untapping all creatures you control and giving them +2/+2 until end of turn.
  4. Activate Ashnod's Altar by sacrificing the Great Oak Guardian token, adding {C}{C}.
  5. Repeat from step 2.

Combo 3 with Yenna, Redtooth Regent + Secret Arcade // Dusty Parlor

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite untap of creatures you control · Infinite mana creatures you control can produce · Infinitely large creatures you control until end of turn
Show steps
  1. Activate Yenna by paying {2} and tapping it, creating a token copy of Great Oak Guardian.
  2. When the Great Oak Guardian token enters, it triggers, untapping all creatures you control and giving them +2/+2 until end of turn.
  3. Activate Ashnod's Altar by sacrificing the Great Oak Guardian token, adding {C}{C}.
  4. Repeat.

Combo 4 with Yenna, Redtooth Regent + Agatha's Soul Cauldron

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite untap of creatures you control · Infinite mana creatures you control can produce · Infinitely large creatures you control until end of turn
Show steps
  1. Activate Great Oak Guardian using the Licid's ability by paying its activation cost, attaching Great Oak Guardian to Yenna and causing Great Oak Guardian to become an Aura.
  2. Activate Yenna by paying {2} and tapping it, creating a token copy of Great Oak Guardian.
  3. When the Great Oak Guardian token enters, it triggers, untapping all creatures you control and giving them +2/+2 until end of turn.
  4. Activate Ashnod's Altar by sacrificing the Great Oak Guardian token, adding {C}{C}.
  5. Repeat from step 2.

Combo 5 with Yenna, Redtooth Regent + Enchanted Evening

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite untap of creatures you control · Infinite mana creatures you control can produce · Infinitely large creatures you control until end of turn
Show steps
  1. Activate Yenna by paying {2} and tapping it, creating a token copy of Great Oak Guardian.
  2. When the Great Oak Guardian token enters, it triggers, untapping all creatures you control and giving them +2/+2 until end of turn.
  3. Activate Ashnod's Altar by sacrificing the Great Oak Guardian token, adding {C}{C}.
  4. Repeat.

Combo 6 with Tawnos, Solemn Survivor

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite self-mill · Infinite untap of creatures you control · Infinite mana creatures you control can produce · Infinitely large creatures you control until end of turn
Show steps
  1. Activate Tawnos's second ability by paying {1}{W}{U}{B}, tapping it and sacrificing two artifact tokens, exiling Great Oak Guardian from your graveyard and creating a token copy of it that is an artifact in addition to its other types.
  2. When the Great Oak Guardian token enters, it triggers, untapping all creatures you control and giving them +2/+2 until end of turn.
  3. Activate Tawnos's first ability by paying {2} and tapping it, creating a copy of the Great Oak Guardian token and causing you to mill two cards.
  4. When the Great Oak Guardian token enters, it triggers, untapping all creatures you control and giving them +2/+2 until end of turn.
  5. Activate Ashnod's Altar by sacrificing a Great Oak Guardian token, adding {C}{C}.
  6. Repeat from step 3.
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