, : This creature fights another target creature
Its a bit slow for most Commander decks, but find ways to synergize with the land token or enchantments and it makes up for that and then some
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
You still want to get in as much combat damage in the early game as you can, even if your opponent will eventually put together too many large blockers for you to clear away
Nissa, Vital Force, Kalonian Hydra, Wolfir Silverheart, and even Whisperwood Elemental are all decent options in the deep deep five slot