Put a +1/+1 counter on target creature. It gets +2/+0 and gains trample until end of turn.

Exile the top two cards of your library. You may play those cards until you next cast a spell from your hand.
Flashback {3}{R}{R}

Cards in graveyards can't leave the graveyard.
Cycling {2}

Corrupt — All creatures get -2/-2 until end of turn. If you control a permanent with greater mana value than this spell, instead creatures your opponents control get -2/-2 until end of turn.

As an additional cost to cast this spell, remove a level counter from a creature you control or pay {3}.
Exile target creature or planeswalker. Surveil 2.

As an additional cost to cast this spell, sacrifice a creature.
Fall Upon Your Blade deals damage equal to the sacrificed creature's power to any target.
Cycling {2}

Enchant creature you control
When Fall from Nyx enters, destroy target artifact or land.
Enchanted creature gets +2/+0.

Choose one —
• Target opponent reveals their hand. You choose a card from it. That player discards that card.
• Target opponent sacrifices a creature or enchantment.

Destroy all creatures.

Whenever a creature you control attacks alone, you may pay {1}{B}. If you do, return this card from your graveyard to the battlefield tapped and attacking.

When Falling Ashes enters, exile up to two target cards from graveyards, then you gain 2 life.

Level up {R/W}
[level 1-2] Whenever a nontoken creature you control with a counter on it dies, create a 1/1 white Citizen creature token.
[level 3+] Whenever a nontoken creature you control with a counter on it dies, create a 4/4 red Error creature token with menace.

Creatures can't attack you or a planeswalker you control unless their controller pays {1} for each of those creatures beyond the first.

Fatal Flourish deals 4 damage to target creature. If excess damage is dealt this way, put that many +1/+1 counters on a creature you control.
Cycling {2}

Target player mills two cards, then mills two more cards for each card named Fathomless Dominion in your graveyard.

Trample
Forestcycling {2}

When this land enters, sacrifice it. If you do, search your library for a basic Swamp or Mountain card, put it onto the battlefield tapped, then shuffle.
{2}{B}{B}{R}{R}, Discard this card: Create a 4/4 red Error creature token with menace.

Deathtouch
Whenever one or more creatures die, create a Berry token.
Whenever Feasting Predator attacks, you may sacrifice a Berry. If you do, up to one target creature gets -1/-1 until end of turn and blocks this combat if able.

Defender
When Feasting Sloth enters, create a Berry token.
Feasting Sloth can attack as though it didn't have defender if it's enchanted, equipped, or has a counter on it.

Feed on the Meek deals 4 damage to target creature. Put X +1/+1 counters on up to one target creature, where X is the amount of excess damage dealt to that creature this way.

Mill X cards. For each land card milled this way, add {B}{B}. For each creature card milled this way, create a 2/2 black Zombie artifact creature token. For each noncreature, nonland card milled this way, draw a card.

Fabric — When this creature enters, add X mana in any combination of colors, where X is the number of enchantments you control.
{1}{R}, Discard a card: Draw a card.

Field Laboratory enters tapped.
{T}: Add {G} or {U}.
{1}, Discard Field Laboratory: Scry 2.

Trample
Whenever you gain control of a permanent you don't own or a permanent you don't own enters under your control, it and Field Opportunist each get +2/+0 and gain haste until end of turn.

Choose one or both —
• Target Human creature you control gets +1/+1 and gains indestructible until end of turn.
• Target non-Human creature you control gets +1/+1 and gains indestructible until end of turn.