Tros [Emissaries of Light]

When a Forward opponent controls is returned from the field to its owner's hand, draw I 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.