How can you create a combo with Tainted Observer, Ashnod's Altar, Herd Baloth?
user
[START OF COMBO]This combo can be formed with Tainted Observer, Ashnod's Altar, Herd Baloth

Color identity: GU
Mana cost: 
Steps:
  1. Cause a creature to enter the battlefield under your control.
  2. When the creature enters the battlefield, Tainted Observer triggers.
  3. Holding priority, activate Ashnod's Altar by sacrificing the creature, adding {C}{C}.
  4. Resolve the Tainted Observer trigger, causing you to pay {2} to put a +1/+1 counter on Herd Baloth.
  5. Herd Baloth triggers, creating a 4/4 Beast creature token.
  6. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Herd Baloth
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite proliferate
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have a way to cause a creature to enter the battlefield under your control.
  - Herd Baloth has at least one +1/+1 counter on it.
[END OF COMBO PREREQUISITES]
assistant