Ben Tennyson

{t}{1}{w} flip the creature and pull a alien from
your alien deck and place it on top of Ben Tennyson and put 2 time counters on it when those counters are gone sacrifice that alien and
put Ben back on the battlefield taped you may
also pay {1}{u} or {1}{b} or {1}{r} or {1}{g}
instead of paying {1}{w}