White Knight

First strike (This creature deals combat damage before creatures without first strike.)
Protection from black (This creature can't be blocked, targeted, dealt damage, or enchanted by anything black.)

Order of Leitbur

Protection from black
{W}: Order of Leitbur gains first strike until end of turn.
{W}{W}: Order of Leitbur gets +1/+0 until end of turn.

Disenchant

Savannah Lions

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Crusade

Tundra Wolves

First strike (This creature deals combat damage before creatures without first strike.)

Armageddon

Land Tax

At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.