The Verdant Lovers

Whenever The Verdant Lovers attacks, put a
+1/+1 counter on each creature that crewed it
this turn.
Crew 2 (Tap any number of untapped creatures you control with total power 2 or more: This Vehicle
becomes an artifact creature until end of turn.)
Their love brings life to those who touch their frozen
forms, as they gave their lives to save the forest they
loved.