Mercadian Masques

Whenever a creature blocks a black or red creature, the blocking creature gets +1/+1 until end of turn.

Ogre Taskmaster can't block.

Whenever a creature attacks you, it gets -1/-0 until end of turn.

Whenever Chambered Nautilus becomes blocked, you may draw a card.

{6}, {T}: Search your library for a Rebel permanent card with converted mana cost 5 or less and put it onto the battlefield. Then shuffle your libr...

If an opponent controls an Island and you control a Forest, you may cast this spell without paying its mana cost.

{1}, Sacrifice a land: Target creature gets +1/+1 until end of turn.

{X}, {T}: Target creature you control gets +X/+X until end of turn. Destroy it at the beginning of the next end step.

{B}: Primeval Shambler gets +1/+1 until end of turn.

{2}: Target player discards a card. Any player may activate this ability but only any time they could cast a sorcery.

{2}: Henge Guardian gains trample until end of turn.

{X}{R}, {T}, Sacrifice Cinder Elemental: It deals X damage to any target.

If an opponent controls a Plains and you control a Mountain, you may cast this spell without paying its mana cost. Haste

Enchant creature Whenever enchanted creature becomes blocked, tap all lands defending player controls.

Whenever Ignoble Soldier becomes blocked, prevent all combat damage that would be dealt by it this turn.

{2}: Target creature gains protection from the color of its controller's choice until end of turn. Any player may activate this ability.

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

Whenever Deathgazer blocks or becomes blocked by a nonblack creature, destroy that creature at end of combat.

{U}, {T}, Discard a card: Counter target spell or ability that targets a creature.

As Jeweled Torque enters the battlefield, choose a color. Whenever a player casts a spell of the chosen color, you may pay {2}. If you do, you gain...

If an opponent controls a Swamp and you control a Plains, you may cast this spell without paying its mana cost. Protection from black

Trample

{X}{B}, {T}, Discard a card: Target creature gets +X/+0 until end of turn.

Target creature gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard.