Exile the top X cards of target opponent's library. You may play those cards for as long as they remain exiled, and you may pay {VP}{VP}{B} rather than pay the mana costs of those spells.

Deathtouch
Drop — When Malicious Mech enters, each player sacrifices a creature. If you didn't cast any creature spells during your last turn, instead each opponent sacrifices a creature.

Drop — When Morasha Moshlord enters, if you didn't cast any creature spells during your last turn, all creatures get +2/-2 and gain menace until end of turn.

Destroy target creature if it has fewer colors than the number of colors of mana spent to cast this spell.

At the beginning of your end step, if you control three or more untapped lands, you draw a card and you lose 1 life.

Target player discards two cards. If all the cards discarded this way share a card type, that player loses 3 life.

Target creature gets +1/+1 and gains deathtouch until end of turn. Scry 1.

Relentless Busker can't block.
{VP}{VP}{VP}: Return Relentless Busker from your graveyard to the battlefield.

Flying
Drop — When Revenant Benefactor enters, if you didn't cast any creature spells during your last turn, return target creature card from your graveyard to the battlefield.

Scry 2, then draw two cards. You lose 2 life.

{VP}{VP}, Sacrifice another creature: Draw a card.

Equipped creature gets +3/+0 and has menace.
Whenever a creature you control enters, if it wasn't cast, you may attach Skeleton Keytar to it.
Equip {5}

Flying
Drop — When Soul Melter enters, if you didn't cast any creature spells during your last turn, each opponent loses 2 life and you gain 2 life.

Return up to three target cards from your graveyard to your hand. Exile Soulless Archive.

Flash

Choose one or both —
• Return target creature card from your graveyard to your hand.
• Return target creature card in your graveyard that was put there from the battlefield this turn to your hand.

Whenever you cast your first spell during each opponent's turn, scry 2.

{B}, Sacrifice another creature: Create a tapped Treasure token. Scry 1.
{1}{B}: Exile two target creature cards from graveyards. You may cast up to one of those cards for as long as they remain exiled.

This spell costs {3}{B} less to cast if a creature died this turn.
Destroy target creature.

As long as it's your turn, Ultraviolet Maniac has lifelink.
{VP}{VP}{VP}: Until end of turn, whenever you gain life, each opponent loses that much life.

Deathtouch
{1}{VP}{VP}: Variegated Shade gets +2/+2 until end of turn.

Lifelink
When Vibeseeker enters, scry 1.

Drop — When Viral Upstarts enters, if you didn't cast any creature spells during your last turn, draw a card and you lose 1 life.

{1}{B}: Search your library for a card named Whisper Squad, put it onto the battlefield tapped, then shuffle.

When Worshipped Diva enters, if a creature died this turn, create a 2/1 red Zombie creature token with menace.