Serum Powder

{T}: Add {C}.
Any time you could mulligan and this card is in your hand, you may exile all the cards from your hand, then draw that many cards. (You can do this in addition to taking mulligans.)

Tsabo's Web

When this artifact enters, draw a card.
Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step.

Goblin

Goblin Gang Leader

When this creature enters, create two 1/1 red Goblin creature tokens.

Velukan Dragon

Flying
Whenever this creature attacks or blocks, roll a six-sided die. This creature gets +X/+0 until end of turn, where X is the result minus 1.

Crackdown

Nonwhite creatures with power 3 or greater don't untap during their controllers' untap steps.

Giver of Runes

{T}: Another target creature you control gains protection from colorless or from the color of your choice until end of turn.

Kataki, War's Wage

All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay {1}."

Nomads en-Kor

{0}: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead.

Path to Exile

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Rest in Peace

When this enchantment enters, exile all graveyards.
If a card or token would be put into a graveyard from anywhere, exile it instead.

Scalelord Reckoner

Flying
Whenever a Dragon you control becomes the target of a spell or ability an opponent controls, destroy target nonland permanent that player controls.

Serenity

At the beginning of your upkeep, destroy all artifacts and enchantments. They can't be regenerated.

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Back to Basics

Nonbasic lands don't untap during their controllers' untap steps.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Chain of Vapor

Return target nonland permanent to its owner's hand. Then that permanent's controller may sacrifice a land of their choice. If the player does, they may copy this spell and may choose a new target for that copy.

Mystery Booster 2