Haste
Whenever Skullbriar deals combat damage to a player, put a +1/+1 counter on it.
Counters remain on Skullbriar as it moves to any zone other than a player's hand or library.

Trample
Landfall — Whenever a land you control enters, double Tifa Lockhart's power until end of turn.

Take an extra turn after this one.

This land enters tapped unless you have two or more opponents.
: Add or .

Each player loses 1 life, discards a card, sacrifices a creature of their choice, then sacrifices a land of their choice.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Flash
Flying
Whenever this creature mutates, destroy target creature or planeswalker an opponent controls.

Whenever you cast an Aura, Equipment, or Vehicle spell, draw a card.

Destroy all lands.

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

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

If you would flip a coin, instead flip two coins and ignore one.

Whenever a player sacrifices a permanent, this creature deals 1 damage to any target.

: Add .

Destroy all nonland permanents with mana value 1 or less.
Cycling (, Discard this card: Draw a card.)

Deathtouch
Darkness — Whenever Cecil deals damage, you lose that much life. Then if your life total is less than or equal to half your starting life total, untap Cecil and transform it.

Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.
Draw a card.

At the beginning of each end step, if an opponent lost 2 or more life this turn, you may put a quest counter on this enchantment. (Damage causes loss of life.)
Whenever a card is put into an opponent's graveyard from anywhere, if this enchantment has three or more quest counters on it, you may have that player lose 2 life. If you do, you gain 2 life.

Each opponent chooses fame or fortune. For each player who chose fame, gain control of a creature that player controls until end of turn. Untap those creatures and they gain haste until end of turn. For each player who chose fortune, you draw a card and create a Treasure token.

: Add .
Channel — , Discard this card: Mill three cards, then return a creature or planeswalker card from your graveyard to your hand. This ability costs less to activate for each legendary creature you control.

Search your library for a card, put that card into your graveyard, then shuffle.