Nath of the Gilt-Leaf

At the beginning of your upkeep, you may have target opponent discard a card at random.
Whenever an opponent discards a card, you may create a 1/1 green Elf Warrior creature token.

Elvish Visionary

When Elvish Visionary enters, draw a card.

Tourach, Dread Cantor

Kicker {B}{B} (You may pay an additional {B}{B} as you cast this spell.)
Protection from white
Whenever an opponent discards a card, put a +1/+1 counter on Tourach, Dread Cantor.
When Tourach enters, if it was kicked, target opponent discards two cards at random.

Bottomless Pit

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

Mind Shatter

Target player discards X cards at random.

Hymn to Tourach

Target player discards two cards at random.

Greel, Mind Raker

{X}{B}, {T}, Discard two cards: Target player discards X cards at random.

Fyndhorn Elder

Mind Twist

Fyndhorn Elves

Llanowar Elves

Elvish Mystic

Hypnotic Specter

Flying
Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random.

Black Cat

When Black Cat dies, target opponent discards a card at random.

Elvish Archdruid

Other Elf creatures you control get +1/+1.
{T}: Add {G} for each Elf you control.

Elvish Harbinger

When Elvish Harbinger enters, you may search your library for an Elf card, reveal it, then shuffle and put that card on top.
{T}: Add one mana of any color.