Basalt Monolith + Leyline of Transformation + Scuttling Sliver + Trazyn the Infinite

UB identity

Commander legal

The 4 combo pieces

What must be in place

Leyline of Transformation on the battlefield with "Sliver" chosen.

How to execute it

  1. Activate Trazyn using Basalt Monolith's ability by tapping it, adding {C}{C}{C}.
  2. Activate Trazyn by paying {2}, untapping it.
  3. Repeat.

What the combo produces