Mana Tithe

Counter target spell unless its controller pays {1}.

Phyrexian Censor

Each player can't cast more than one non-Phyrexian spell each turn.
Non-Phyrexian creatures enter tapped.

Flash
{1}, Sacrifice Cathar Commando: Destroy target artifact or enchantment.

Sacrifice Kami of False Hope: Prevent all combat damage that would be dealt this turn.

{3}, {T}: Search your library for a Rebel permanent card with mana value 2 or less, put it onto the battlefield, then shuffle.

{4}, {T}: Search your library for a Rebel permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.

{T}: Tap target creature with toughness 2 or less.

Flying
{4}, {T}: Search your library for a Rebel permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.

Enchant creature
Enchanted creature can't attack or block.

Sacrifice Children of Korlis: You gain life equal to the life you've lost this turn. (Damage causes loss of life.)

Sacrifice Benevolent Bodyguard: Target creature you control gains protection from the color of your choice until end of turn.

When Thraben Inspector enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")