Forced Fruition

Whenever an opponent casts a spell, that player draws seven cards.

Kami of the Crescent Moon

At the beginning of each player's draw step, that player draws an additional card.

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

Players have no maximum hand size.
At the beginning of each player's draw step, that player draws an additional card, then discards a card.