Monastic Knights

Legion 2 (As this creature enters the battlefield, either put
4 +1/+1 counters on it, or create two copies of this creature. The copies enter as non-legendary, and without this ability.)

Cooldown 6 (Once activated, this ability cannot be
used for 6 turns) {1}:
All Knights under your control gain +2/+0 and trample until end of turn. For each Knight that is blocked this turn, reduce the Cooldown of this ability by 1.