Scorchmark

Scorchmark deals 2 damage to target creature. If that creature would die this turn, exile it instead.

Skarrgan Hellkite

Riot (This creature enters with your choice of a +1/+1 counter or haste.)
Flying
{3}{R}: This creature deals 2 damage divided as you choose among one or two targets. Activate only if this creature has a +1/+1 counter on it.

Skewer the Critics

Spectacle {R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)
Skewer the Critics deals 3 damage to any target.

Smelt-Ward Ignus

{2}{R}, Sacrifice this creature: Gain control of target creature with power 3 or less until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery.

Spear Spewer

Defender
{T}: This creature deals 1 damage to each player.

Spikewheel Acrobat

Spectacle {2}{R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

Storm Strike

Target creature gets +1/+0 and gains first strike until end of turn. Scry 1.

Impassioned Orator

Whenever another creature you control enters, you gain 1 life.

Tin Street Dodger

Haste
{R}: This creature can't be blocked this turn except by creatures with defender.

Axebane Beast

Ooze

Biogenic Ooze

When this creature enters, create a 2/2 green Ooze creature token.
At the beginning of your end step, put a +1/+1 counter on each Ooze you control.
{1}{G}{G}{G}: Create a 2/2 green Ooze creature token.

Biogenic Upgrade

Distribute three +1/+1 counters among one, two, or three target creatures, then double the number of +1/+1 counters on each of those creatures.

End-Raze Forerunners

Vigilance, trample, haste
When this creature enters, other creatures you control get +2/+2 and gain vigilance and trample until end of turn.

Enraged Ceratok

This creature can't be blocked by creatures with power 2 or less.

Gatebreaker Ram

This creature gets +1/+1 for each Gate you control.
As long as you control two or more Gates, this creature has vigilance and trample.

Gift of Strength

Target creature gets +3/+3 and gains reach until end of turn.

Ravnica Allegiance