Until end of turn, permanents your opponents control gain "When this permanent deals damage to the player who cast Hellish Rebuke, sacrifice this permanent. You lose 2 life."

Destroy up to X target artifacts and/or enchantments. Create twice X 1/1 black and green Pest creature tokens with "When this token dies, you gain 1 life."

Equipped creature gets +1/+1.
Whenever equipped creature attacks, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Equip

Hexproof
Lieutenant — As long as you control your commander, this creature gets +2/+2 and has "Whenever this creature becomes blocked, you may draw two cards."

Creatures you control have trample.
Creatures your opponents control lose trample and can't have or gain trample.

Flying, haste
This creature enters with X +1/+1 counters on it.

At the beginning of your upkeep, you draw a card and you lose 1 life.

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Until end of turn, creatures target player controls lose all abilities and have base power and toughness 0/2.

Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for .)

Whenever you cast a Spirit or Arcane spell, reveal the top three cards of your library. Put all land cards revealed this way into your hand and the rest on the bottom of your library in any order.
Soulshift 2 (When this creature dies, you may return target Spirit card with mana value 2 or less from your graveyard to your hand.)

Other blue creatures you control get +1/+1.
: Target artifact creature becomes blue until end of turn.
Tap an untapped blue creature you control: Add . Spend this mana only to cast artifact spells or activate abilities of artifacts.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Firebending X, where X is this creature's power. (Whenever this creature attacks, add X . This mana lasts until end of combat.)

Destroy target land. Star of Extinction deals 20 damage to each creature and each planeswalker.

: Add one mana of any color.
, : Put X +1/+1 counters on target creature, where X is the number of Bobbleheads you control. Activate only as a sorcery.

This land enters tapped unless you control two or more other lands.
: Add or .

This spell can't be countered.
Trample, ward , haste
Toxic 4 (Players dealt combat damage by this creature also get four poison counters.)

Players can't cast spells from graveyards or activate abilities of cards in graveyards.
Whenever a creature dies, you gain 1 life.

Search your library for up to X basic land cards, where X is the greatest power among creatures you control. Put those cards onto the battlefield tapped, then shuffle.

Flying
When Jugan dies, you may distribute five +1/+1 counters among any number of target creatures.

Will of the council — Starting with you, each player votes for sickness or psychosis. If sickness gets more votes, creatures your opponents control get -2/-2 until end of turn. If psychosis gets more votes or the vote is tied, each opponent discards two cards.