Topplegeist

A one-drop flier that taps a blocker on the way in is nothing new, but the delirium clause reshapes what the body means over a long game. The enters-the-battlefield tap is the aggressive read: play it on curve, clear a lane, get in for one in the air. The upkeep tap is the attrition read: once four card types sit in your graveyard, every opposing upkeep gets audited, one of their creatures kept horizontal before combat is even on the table. That turns a disposable evasive attacker into a recurring soft lock on a single threat, and it rewards a deck already churning its graveyard for other reasons rather than one straining to enable delirium for this alone. The tension worth noting is that the two abilities pull in different directions: the aggressive white flier wants to close fast, while the delirium payoff wants the game to go long enough for the yard to fill. A 1/1 that never trades up is a modest ceiling, so the card lives or dies on how reliably that upkeep trigger fires and how much a repeated tap-down matters against the specific creature it can lock. It is a small piece of design doing two jobs at two different speeds, which is more than most white one-drop bodies attempt.