Common Cause

Nonartifact creatures get +2/+2 as long as they all share a color.

Genju of the Realm

Enchant land
{2}: Enchanted land becomes a legendary 8/12 Spirit creature with trample until end of turn. It's still a land.
When enchanted land is put into a graveyard, you may return Genju of the Realm from your graveyard to your hand.

Sinister Strength

Enchant creature
Enchanted creature gets +3/+1 and is black.

Spinal Graft

Enchant creature
Enchanted creature gets +3/+3.
When enchanted creature becomes the target of a spell or ability, destroy that creature. It can't be regenerated.

Screaming Fury

Target creature gets +5/+0 and gains haste until end of turn.

Feast of the Unicorn

Enchant creature
Enchanted creature gets +4/+0.

Momentum

Enchant creature
At the beginning of your upkeep, you may put a growth counter on this Aura.
Enchanted creature gets +1/+1 for each growth counter on this Aura.

Sword of Kaldra

Equipped creature gets +5/+5.
Whenever equipped creature deals damage to a creature, exile that creature. (Exile it only if it's still on the battlefield.)
Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.)

Mythic Proportions

Enchant creature
Enchanted creature gets +8/+8 and has trample.

Monstrous Growth

Target creature gets +4/+4 until end of turn.

Improvised Armor

Enchant creature
Enchanted creature gets +2/+5.
Cycling {3} ({3}, Discard this card: Draw a card.)

Fit of Rage

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

Giant Strength

Enchant creature
Enchanted creature gets +2/+2.

Desperate Charge

Creatures you control get +2/+0 until end of turn.

Riding Red Hare

Target creature gets +3/+3 and gains horsemanship until end of turn. (It can't be blocked except by creatures with horsemanship.)

Squee's Embrace

Enchant creature
Enchanted creature gets +2/+2.
When enchanted creature dies, return that card to its owner's hand.