How can you create a combo with Scholar of New Horizons, Intruder Alarm, Lesser Masticore, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Scholar of New Horizons, Intruder Alarm, Lesser Masticore, Ashnod's Altar

Color identity: WU
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Lesser Masticore, adding {C}{C}.
  2. Lesser Masticore dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. Lesser Masticore enters the battlefield, triggering Intruder Alarm, untapping all creatures.
  4. Activate Scholar of New Horizons by tapping it and removing the -1/-1 counter from Lesser Masticore, causing you to search your library for a Plains card and either put it onto the battlefield or put it into your hand.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mana creatures you control can produce
  - Infinite sacrifice triggers
  - Infinite untap of all creatures
  - Put all Plains cards from your libary into your hand[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Scholar of New Horizons does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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