{T}: Add {C}. ({C} represents colorless mana.)
{2}{C}, {T}: Draw a card. Activate only if you have no cards in hand.
It doesn’t matter how many cards are in your hand as the last ability resolves. For example, if you have no cards in hand and control two Sea Gate Wreckages, you can activate the last ability of each of them. You’ll draw a card as each ability resolves.