Mountain

Library of Leng

You have no maximum hand size.
If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.

Spiraling Embers

Spiraling Embers deals damage to any target equal to the number of cards in your hand.

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

Whirlpool Rider

When Whirlpool Rider enters, shuffle the cards from your hand into your library, then draw that many cards.

Counterspell

Island

Jace's Erasure

Whenever you draw a card, you may have target player mill a card.

Treasure Hunt

Reveal cards from the top of your library until you reveal a nonland card, then put all cards revealed this way into your hand.