Flay
{3}{B}
Sorcery
Target player discards a card at random. Then that player discards another card at random unless they pay {1}.
Gwendlyn Di Corci
{U}{B}{B}{R}
Legendary Creature -- Human Rogue
3/5
{T}: Target player discards a card at random. Activate only during your turn.
Mindwhip Sliver
{2}{B}
Creature -- Sliver
2/2
All Slivers have "{2}, Sacrifice ~this~: Target player discards a card at random. Activate only as a sorcery."
Resounding Scream
{2}{B}
Sorcery
Target player discards a card at random.
Cycling {5}{U}{B}{R} ({5}{U}{B}{R}, Discard ~this~: Draw a card.)
When you cycle ~this~, target player discards two cards at random.
Sanity Gnawers
{1}{B}{R}
Creature -- Rat
1/1
When ~this~ enters, target player discards a card at random.
Specter's Wail
{1}{B}
Sorcery
Target player discards a card at random.