Achidna, True Dragon

Flying, Lifelink

Put X +1,+1 counters on another creature you control, X is the number of {w} and/or {u}.

Lightning Key- {t}{3}{u}{w} make 3 white/red 1/1 dragon tokens with "sacrifice this token and add +1,+1 counter to Dragon creatures."

When this card is exiled, add it to your hand at the beginning of your next upkeep.