How can you create a combo with Orvar, the All-Form, Specimen Collector, Phyrexian Altar?
user
[START OF COMBO]This combo can be formed with Orvar, the All-Form, Specimen Collector, Phyrexian Altar

Color identity: U
Mana cost: 
Steps:
  1. Cast any instant or sorcery spell from your hand by paying its mana cost, targeting Specimen Collector.
  2. Orvar's first ability triggers, creating a token copy of Specimen Collector.
  3. The Specimen Collector token enters the battlefield, creating a 1/1 Squirrel and a 0/3 Crab creature token.
  4. Activate Phyrexian Altar by sacrificing the nontoken Specimen Collector, adding one mana of any color.
  5. The nontoken Specimen Collector dies, creating a token copy of the Specimen Collector copy.
  6. Repeat from step 3, sacrificing one of the two Specimen Collector copies instead.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have an instant or sorcery card in hand that can target Specimen Collector with the mana to cast it.
[END OF COMBO PREREQUISITES]
assistant