Moosha, Apex of Might

Haste, Trample, Double-Strike, Nasty
Mutate {7}{w}{r}{g} When this creature mutates,
gets +5/+5 and can deal combat damage as
though it were not blocked until end of turn
Remove 4 counters from target opponent that
a source you controlled put on them: Exile the top
card of your library. Until the end of your next
turn, you may cast it. If this is the third time this
ability has resolved this turn, instead you may cast
spells from Exile this turn without paying their
mana cost. Activa