Brimstone Trebuchet + Elemental Mastery + Xenograft

UR identity

Commander legal

The 3 combo pieces

What must be in place

Elemental Mastery attached to Brimstone Trebuchet.
Brimstone Trebuchet does not have summoning sickness.
"Knight" chosen with Xenograft.

How to execute it

  1. Activate Brimstone Trebuchet by tapping it, creating a 1/1 Elemental creature token.
  2. The Elemental enters the battlefield as a Knight due to Xenograft, triggering Brimstone Trebuchet, untapping Brimstone Trebuchet.
  3. Repeat.

What the combo produces