Deciding whether to develop your board state or attack with your creatures can be a decision that players cannot afford to make, especially in a format as fast as Modern
This blue instant has lots of potential in decks revolving around counters
, Sacrifice a Pentavite: Put a +1/+1 counter on this creature
Ultron, Artificial Malevolence Ultron, Artificial Malevolence is a breakout commander from Marvel Super Heroes , one of the few colorless commanders really worth running
You can exile a bunch of cards from yards with this, and the other modes are all useful
Culling the Weak, Ad Nauseam, Rhystic Study, Demonic Tutor, and Thassa's Oracle, for example, are among the strongest cards in Commander, and Dimir decks have access to all of them