How can you create a combo with Undead Sprinter, Runaway Steam-Kin, Phyrexian Altar?
user
[START OF COMBO]This combo can be formed with Undead Sprinter, Runaway Steam-Kin, Phyrexian Altar

Color identity: BR
Mana cost: {B/R}{B/R}{B/R}, minus {B/R} for each +1/+1 counter on Runaway Steam-Kin
Steps:
  1. Activate Phyrexian Altar by sacrificing Undead Sprinter, adding {B/R}.
  2. If Runaway Steam-Kin has three or more +1/+1 counters on it, activate it by removing three +1/+1 counters from it, adding {R}{R}{R}.
  3. Cast Undead Sprinter from your graveyard by paying {B}{R}.
  4. Runaway Steam-Kin triggers, putting a +1/+1 counter on it.
  5. Repeat from step 2.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - A non-Zombie creature has died this turn.
[END OF COMBO PREREQUISITES]
assistant