Traumatize

Target player mills half their library, rounded down.

Wall of Frost

Defender
Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step.

Flying
Creature spells with flying you cast cost {1} less to cast.

Enchant creature
{W}: Enchanted creature gets +1/+1 until end of turn.

{U}: This creature gets +1/-1 until end of turn.
{U}: This creature gets -1/+1 until end of turn.

Flying
Whenever a creature with flying attacks, you may draw a card.

{1}{U}: Target creature gains flying until end of turn.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.

Enchant Equipment
At the beginning of your upkeep, if enchanted Equipment is attached to a creature, destroy that creature.

Whenever you cast an enchantment spell, you may have target creature get -2/-2 until end of turn.

Sacrifice another creature: This creature gets +2/+2 until end of turn.

{2}, {T}: Search your library for a card named Festering Newt or Bubbling Cauldron, put it onto the battlefield tapped, then shuffle.

Sliver creatures you control have double strike. (They deal both first-strike and regular combat damage.)

{2}{B}, Sacrifice this creature: Return another target creature card from your graveyard to your hand.