Tros

When a Forward opponent controls is returned from the field to its owner's hand, draw 1 card. This effect will trigger only once per turn. Damage 3 -- 《0》: Until the end of the turn, Tros also becomes a Forward with 7000 power and "When Tros attacks, choose 1 Forward of cost 4 or less opponent controls. Return it to its owner's hand." You can only use this ability once per turn.