Onyx II, Realm Breaker

Haste, Double strike, Escape 4
Absorption cannon: {2}Sacrifice another artifact creature, put X +1/+1 counters onto Onyx II where
X was the sacrificed creatures power. Counters remain on Onyx in the graveyard. Whenever you attack with Onyx, sacrifice half your creatures rounded down.

Whenever you draw your second spell each turn, create a 0/0 synth pilot creature token with modular 1.