Onyx II, Realm Breaker

Haste, Double strike, Escape 4
Absorption Protocol: {2} sacrifice another artifact creature you control, add X +1/+1 counters to Onyx, where X is the sacrificed creatures power.
Counters remain on Onyx in the graveyard. Whenever you attack with Onyx, sacrifice half the creatures you control, rounded down.

Whenever you draw your second card each turn, create a 0/0 synth pilot artifact creature token with Modular 1.