Widrunner Kaladin

Fist strike
Windrunner Kaladin enters the battlefield with X flying counters
Stormlight; flying (you may pay one colorless mana for each two flying counters on Windrunner Kaladin to put a flying counter on Windrunner Kaladin. At the beginning of your end step, remove a flying counter from Windrunner Kaladin. Windrunner Kaladin's power and toughness are each equal to one plus the number of flying counters on windrunner Kaladin)