How can you create a combo with Prowling Geistcatcher, Felidar Guardian, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Prowling Geistcatcher, Felidar Guardian, Ashnod's Altar

Color identity: WB
Mana cost: {3}{W}
Steps:
  1. Cast Felidar Guardian by paying {3}{W}.
  2. Felidar Guardian enters the battlefield, triggering its ability, targeting Prowling Geistcatcher.
  3. Holding priority, activate Ashnod's Altar by sacrificing Felidar Guardian, adding {C}{C}.
  4. Prowling Geistcatcher triggers, exiling Felidar Guardian from your graveyard.
  5. Resolve the Felidar Guardian trigger from 2, blinking Prowling Geistcatcher.
  6. Prowling Geistcatcher leaves the battlefield, returning Felidar Guardian from exile to the battlefield.
  7. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite blinking
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Prowling Geistcatcher must be on the battlefield
  - Felidar Guardian must be in your hand
  - Ashnod's Altar must be on the battlefield
[END OF COMBO PREREQUISITES]
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