To me, this card reads: You and target opponent each draw three cards, then you become friends, and thats how its played out every time for me
4-Toxic Deluge: I wanted Damnation
If you prefer using the powerful 8/8 Liberty Prime, Recharged card as your Commander in the Science
What this basically means for the set is that there are a lot more mechanics than usual to learn
Key has a lot of utility with things like Divining Top, Steel Overseer and so forth but it is most reliably a card that essentially mimics a Sol Ring rather effectively once you have some kind of artifact that taps for 3
The universal dilemma of the Infiltrator was that few decks that played it wanted to tap out to get him there, but sticking him on the board was so devastating that most opponents would consider themselves fortunate to spend that window of opportunity making him go away as trying to race him with a traditional three- or four-drop was pure folly and playing your own blocker, including your own Shadowmage or something a little bulkier risked a removal spell that would lead into a downward spiral of card disadvantage