Pure Intentions

Whenever a spell or ability an opponent controls causes you to discard cards this turn, return those cards from your graveyard to your hand.
When a spell or ability an opponent controls causes you to discard this card, return this card from your graveyard to your hand at the beginning of the next end step.

Stiltzkin, Moogle Merchant

Lifelink
{2}, {T}: Target opponent gains control of another target permanent you control. If they do, you draw a card.

Spiritual Focus

Whenever a spell or ability an opponent controls causes you to discard a card, you gain 2 life and you may draw a card.

Ensnaring Bridge

Creatures with power greater than the number of cards in your hand can't attack.

Chain of Smog

Target player discards two cards. That player may copy this spell and may choose a new target for that copy.

Plains

Swamp

Lotus Petal

{T}, Sacrifice this artifact: Add one mana of any color.

Surgical Extraction

({B/P} can be paid with either {B} or 2 life.)
Choose target card in a graveyard other than a basic land card. Search its owner's graveyard, hand, and library for any number of cards with the same name as that card and exile them. Then that player shuffles.

Necrogen Mists

At the beginning of each player's upkeep, that player discards a card.

Lupine Prototype

This creature can't attack or block unless a player has no cards in hand.

Cunning Lethemancer

At the beginning of your upkeep, each player discards a card.

Metrognome

When a spell or ability an opponent controls causes you to discard this card, create four 1/1 colorless Gnome artifact creature tokens.
{4}, {T}: Create a 1/1 colorless Gnome artifact creature token.