Hidetsugu, Devouring Chaos + Intruder Alarm + Mortuary + Stonecoil Serpent

UBR identity

Commander legal

The 4 combo pieces

What must be in place

Hidetsugu does not have summoning sickness.
Creatures you control can tap to produce at least {3}{R}.

How to execute it

  1. Activate all mana-producing creatures you control by tapping them, adding at least {3}{R}.
  2. Cast Stonecoil Serpent by paying {0}.
  3. Stonecoil Serpent enters the battlefield and dies as a state-based action due to having zero toughness.
  4. Intruder Alarm and Mortuary trigger.
  5. Resolve the Intruder Alarm trigger, untapping all creatures.
  6. Resolve the Mortuary trigger, putting Stonecoil Serpent on top of your library from your graveyard.
  7. Activate Hidetsugu's second ability by paying {2}{R} and tapping it, exiling Stonecoil Serpent from the top of your library and allowing you cast it this turn.
  8. Repeat.

What the combo produces