Snorting Gahr

Whenever this creature becomes blocked, it gets +2/+2 until end of turn.

Spidersilk Armor

Creatures you control get +0/+1 and have reach. (They can block creatures with flying.)

Saproling

Spontaneous Generation

Create a 1/1 green Saproling creature token for each card in your hand.

Squall

Squall deals 2 damage to each creature with flying.

Squallmonger

{2}: This creature deals 1 damage to each creature with flying and each player. Any player may activate this ability.

Stamina

Enchant creature
Enchanted creature has vigilance.
Sacrifice this Aura: Regenerate enchanted creature.

Sustenance

{1}, Sacrifice a land: Target creature gets +1/+1 until end of turn.

Tiger Claws

Flash
Enchant creature
Enchanted creature gets +1/+1 and has trample.

Moment of Silence

Target player skips their next combat phase this turn.

Tranquility

Venomous Breath

Choose target creature. At this turn's next end of combat, destroy all creatures that blocked or were blocked by it this turn.

Venomous Dragonfly

Flying
Whenever this creature blocks or becomes blocked by a creature, destroy that creature at end of combat.

Vernal Equinox

Any player may cast creature and enchantment spells as though they had flash.

Vine Dryad

You may exile a green card from your hand rather than pay this spell's mana cost.
Flash
Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

Vine Trellis

Defender (This creature can't attack.)
{T}: Add {G}.

Assembly Hall

{4}, {T}: Reveal a creature card in your hand. Search your library for a card with the same name as that card, reveal it, put it into your hand, then shuffle.

Mercadian Masques