Hideous End

Destroy target nonblack creature. Its controller loses 2 life.

Windrider Eel

Flying
Landfall — Whenever a land you control enters, Windrider Eel gets +2/+2 until end of turn.

Surrakar Marauder

Landfall — Whenever a land you control enters, Surrakar Marauder gains intimidate until end of turn. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Welkin Tern

Flying (This creature can't be blocked except by creatures with flying or reach.)
Welkin Tern can block only creatures with flying.

Paralyzing Grasp

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.

Giant Scorpion

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Kraken Hatchling

Swamp

Island

Disfigure

Target creature gets -2/-2 until end of turn.

Umara Raptor

Flying
Whenever Umara Raptor or another Ally you control enters, you may put a +1/+1 counter on Umara Raptor.

Nimana Sell-Sword

Whenever Nimana Sell-Sword or another Ally you control enters, you may put a +1/+1 counter on Nimana Sell-Sword.