When Plagon enters, draw a card for each creature you control with toughness greater than its power.
: Target creature you control assigns combat damage equal to its toughness rather than its power this turn.
Build a board of high-toughness defensive creatures, then turn them into beaters by assigning combat damage equal to toughness. Plagon's ETB rewards going wide with toughness-heavy creatures by drawing a fistful of cards, and his activated ability lets your walls attack for huge damage. You grind value behind defensive bodies and close with toughness-based aggression or a combat finisher.
Strong card advantage engine via the ETB, especially with flicker effects to re-trigger it
Turns naturally defensive walls into lethal attackers, catching opponents off guard
UW gives access to premier removal, board wipes, and protection
Doublestrike and trample payoffs scale absurdly with high-toughness creatures
Plagon himself is fragile and the activated ability is one creature at a time without cost reduction
Strategy is fairly board-dependent and vulnerable to wraths
Lacks reach and ramp inherent to UW; can be slow to set up
Toughness-as-power synergy is narrow, so off-theme draws can be clunky
Cheap high-toughness body that draws on its own and pads the Plagon ETB count.
Add global enablers (Doran, Assault Formation, High Alert) so you don't rely on Plagon's slow per-creature activation, and pack evasion like Tetsuko Umezawa and trample/double strike to push damage through. Lean into blink (Ephemerate, Soulherder, Eldrazi Displacer) to abuse the ETB draw, and tune the curve with strong UW staples—Swords to Plowshares, Cyclonic Rift, and ramp like Sol Ring—to stabilize and out-value the table.
Legendary Creature — Starfish Wizard
: Target creature you control assigns combat damage equal to its toughness rather than its power this turn.