The Thirteenth Doctor
The two abilities read like a matched pair for a deck that treats its hand as a waypoint rather than a home. The first triggers whenever you cast a spell from any zone but your grip (a flashback, a foretell, an adventure, a cascade hit) and drops a +1/+1 counter on a creature; the second untaps every counter-bearing creature you control at your end step. The loop is the point. Feed the board counters off those off-grip casts, then get free untaps, so your creatures can attack into an open board and still be back on defense before the turn passes. The 2/2 body is almost incidental; this is an engine that wants a critical mass of alternative casting zones and a wide enough board for the untap trigger to scale. What makes the design worth noting is how it stacks two mechanics that historically lived apart: the graveyard-and-exile recasting that green and blue have flirted with, and the vigilance-adjacent untap effect white usually owns, folded together so the counters bridge them. Neither ability does much on its own. Together they turn a token board or a spellslinging shell into something that grinds through combat without ever tapping out defensively, which is a more specific and more demanding build requirement than the modest stat line suggests.
