How can you create a combo with Elbrus, the Binding Blade // Withengar Unbound, Triskelion, Agatha's Soul Cauldron, Grafted Exoskeleton?
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[START OF COMBO]This combo can be formed with Elbrus, the Binding Blade // Withengar Unbound, Triskelion, Agatha's Soul Cauldron, Grafted Exoskeleton

Color identity: B
Mana cost: 
Steps:
  1. Deal combat damage to an opponent using Withengar Unbound, causing them to get at least ten poison counters.
  2. The opponent loses the game as a state-based action due to having ten or more poison counters.
  3. Withengar Unbound triggers, putting thirteen +1/+1 counters on it.
  4. Activate Withengar Unbound using Triskelion's ability by removing a +1/+1 counter from it, giving an opponent a poison counter.
  5. Repeat step 4 until the opponent loses the game as a state-based action due to having ten or more poison counters.
  6. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Each opponent loses the game[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Elbrus, the Binding Blade // Withengar Unbound must be on the battlefield
  - Triskelion must be exiled
  - Agatha's Soul Cauldron must be on the battlefield
  - Grafted Exoskeleton must be on the battlefield
  - Elbrus on the battlefield as Withengar Unbound.
  - Withengar Unbound does not have summoning sickness.
  - An opponent cannot block Withengar Unbound, or cannot prevent at least ten trample damage from Withengar Unbound.
  - Grafted Exoskeleton attached to Withengar Unbound.
  - Triskelion exiled by Agatha's Soul Cauldron.
[END OF COMBO PREREQUISITES]
assistant