Garthon, Deep Sea Cataloger

If a player would draw a card beyond their draw
step, instead, put the top card of that player's
library into their graveyard, then they draw a card.
{u}: Draw a card. Only activate this ability if
the are 10 or more cards in your graveyard.
{b}: Return a card from your graveyard to your
hand. Only activate this ability if there are at least
10 cards in each other player's graveyard.