Mean surprise

Trample Whenever another artifact enters, put a +1/+1 counter on this creature. Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

This creature enters with five +1/+1 counters on it. , Remove a +1/+1 counter from this creature: Create a 1/1 colorless Pentavite artifact creature token with flying. , Sacrifice a Pentavite: Put a +1/+1 counter on this creature.

When this artifact enters, put a -1/-1 counter on target creature. , : Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When this artifact enters, put a -1/-1 counter on each creature target player controls. , : Proliferate twice. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)