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
If you're going second and play this turn one, you can immediately fill your hand again
As long as this enchantment has seven or more quest counters on it, creatures you control get +5/+5
Better to cut it for something that's more consistently helpful
Consider a few of these top picks that can smooth your experience and offer more power in your deck
Dominate with land-based power in Tricky Terrain, the GreenBlue Commander deck from Modern Horizons3. Lead with Omo, Queen of Vesuva and Jyoti, Moag Ancientboth foil Legendary Commandersor replay with the foil-etched display commander