How can you create a combo with Putrid Goblin, First Day of Class, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Putrid Goblin, First Day of Class, Altar of Dementia

Color identity: BR
Mana cost: {1}{R}
Steps:
  1. Cast First Day of Class by paying {1}{R}, causing all creatures that enter the battlefield under your control this turn to get an additional +1/+1 counter put on it.
  2. Activate Altar of Dementia by sacrificing Putrid Goblin.
  3. Putrid Goblin's persist ability triggers, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
  4. Putrid Goblin enters the battlefield, triggering First Day of Class, putting a +1/+1 counter on Putrid Goblin.
  5. Resolve the Altar of Dementia ability from step 2, causing target player to mill cards equal to Putrid Goblin's power.
  6. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Putrid Goblin must be on the battlefield
  - First Day of Class must be in your hand
  - Altar of Dementia must be on the battlefield
  - Putrid Goblin does not have a -1/-1 counter on it.
[END OF COMBO PREREQUISITES]
assistant