You may pay rather than pay the mana cost for spells you cast.

Black creature spells you cast cost less to cast.

Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life.

Colorless spells you cast with mana value 7 or greater cost less to cast.

Other colorless creatures you control get +1/+1.

Whenever you cast a white spell or a Plains you control enters, you gain 1 life.

Creature spells you cast have sticker kicker . (You may pay an additional as you cast a creature spell. If you do, you get , then you may put a sticker on it.)

Green creature spells you cast cost less to cast.

Whenever you cast a creature spell, target creature you control gets +2/+2 and gains trample until end of turn.

As this artifact enters, choose a creature type.

Creature spells of the chosen type cost less to cast.

Whenever a player casts a white spell, you may pay . If you do, you gain 1 life.

Whenever a player casts a white spell, you may pay . If you do, untap target permanent.

Whenever a player casts a red spell, you may gain 1 life.

Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for .)

Whenever a player casts a blue spell, you may gain 1 life.

Whenever a player casts a green spell, you may gain 1 life.

Whenever a player casts a black spell, you may gain 1 life.

As this artifact enters, choose artifact, creature, enchantment, instant, or sorcery.

Spells you cast of the chosen type cost less to cast.

Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

Whenever you cast an artifact spell, put a +1/+1 counter on this creature.

Flash

You may cast artifact spells as though they had flash.

Blue creature spells you cast cost less to cast.

Whenever you cast a creature spell, target creature an opponent controls doesn't untap during its controller's next untap step.