Sure-Footed Infiltrator

The evasion here is not free, which is exactly the design lever this card pulls. Most blue unblockable enablers simply are unblockable, or pay a mana tax to become so; this one demands a body, specifically an untapped Rogue you already control, tapped down for the turn to push this creature through. That converts a wide board into a resource: every Rogue is a potential key to unlock combat damage, and the trigger turns that damage into a card. The tension is between going wide and swinging in. Tap a Rogue to make this one connect, and you have committed that Rogue to the tap, sacrificing its attack or its own evasion enabler that turn. The card wants a Rogue deck built with enough redundant bodies that spending one to draw a card feels cheap rather than costly, which is a real deckbuilding demand rather than a synergy footnote. This is the descendant of blue card-advantage attackers that had to connect first: Thieving Magpie, Ophidian, the whole line of creatures whose draw is contingent on getting through rather than guaranteed. The difference is that the getting-through is self-contained within the tribe, so a Rogue board answers its own blocker problem. A 2/3 that reads its own untapped teammates as launch fuel, and rewards the go-wide plan for keeping one back.