Frantic Search

Draw two cards, then discard two cards. Untap up to three lands.

Island

Forget

Target player discards two cards, then draws as many cards as they discarded this way.

Swamp

Waterfront Bouncer

{U}, {T}, Discard a card: Return target creature to its owner's hand.

Oskar, Rubbish Reclaimer

This spell costs {1} less to cast for each different mana value among cards in your graveyard.
Whenever you discard a nonland card, you may cast it from your graveyard.

Mind Over Matter

Discard a card: You may tap or untap target artifact, creature, or land.

Unfulfilled Desires

{1}, Pay 1 life: Draw a card, then discard a card.

Chromatic Orrery

You may spend mana as though it were mana of any color.
{T}: Add {C}{C}{C}{C}{C}.
{5}, {T}: Draw a card for each color among permanents you control.

Funeral Charm

Choose one —
• Target player discards a card.
• Target creature gets +2/-1 until end of turn.
• Target creature gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.)

Attunement

Return Attunement to its owner's hand: Draw three cards, then discard four cards.

Forbid

Buyback—Discard two cards. (You may discard two cards in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)
Counter target spell.