Festering Mummy

When Festering Mummy dies, you may put a -1/-1 counter on target creature.

Jiang Yanggu, Wildcrafter

Each creature you control with a +1/+1 counter on it has "{T}: Add one mana of any color."
−1: Put a +1/+1 counter on target creature.

Dauntless Aven

Flying
Whenever Dauntless Aven attacks, untap target creature you control.

Bond of Revival

Return target creature card from your graveyard to the battlefield. It gains haste until your next turn.

Steadfast Sentinel

Vigilance
Eternalize {4}{W}{W} ({4}{W}{W}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Human Cleric with no mana cost. Eternalize only as a sorcery.)

Hazoret's Monument

Red creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, you may discard a card. If you do, draw a card.

Forest

Splendid Agony

Distribute two -1/-1 counters among one or two target creatures.

Oasis Ritualist

{T}: Add one mana of any color.
{T}, Exert Oasis Ritualist: Add two mana of any one color. (An exerted creature won't untap during your next untap step.)

Mighty Leap

Target creature gets +2/+2 and gains flying until end of turn.

Without Weakness

Target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it. If its toughness is 0 or less, it's still put into its owner's graveyard.)
Cycling {2} ({2}, Discard this card: Draw a card.)

Swamp

Jaya's Greeting

Jaya's Greeting deals 3 damage to target creature. Scry 1.

Grisly Survivor

Whenever you cycle or discard a card, Grisly Survivor gets +2/+0 until end of turn.

Winged Shepherd

Flying, vigilance
Cycling {W} ({W}, Discard this card: Draw a card.)

Huatli's Raptor

Vigilance
When Huatli's Raptor enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Unburden

Target player discards two cards.
Cycling {2} ({2}, Discard this card: Draw a card.)

Mountain

Sparring Mummy

When Sparring Mummy enters, untap target creature.

Fan Bearer

Charmed Stray

Lifelink
When Charmed Stray enters, put a +1/+1 counter on each other creature you control named Charmed Stray.

Wretched Camel

When Wretched Camel dies, if you control a Desert or there is a Desert card in your graveyard, target player discards a card.

Defiant Strike

Target creature gets +1/+0 until end of turn.
Draw a card.

Martyr for the Cause

When Martyr for the Cause dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Cruel Celebrant

Whenever Cruel Celebrant or another creature or planeswalker you control dies, each opponent loses 1 life and you gain 1 life.

Island

Binding Mummy

Whenever another Zombie you control enters, you may tap target artifact or creature.

Wanderer's Strike

Exile target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Topple the Statue

Tap target permanent. If it's an artifact, destroy it.
Draw a card.

Meandering River

Meandering River enters tapped.
{T}: Add {W} or {U}.

Tah-Crop Elite

Flying
You may exert Tah-Crop Elite as it attacks. When you do, creatures you control get +1/+1 until end of turn. (An exerted creature won't untap during your next untap step.)