Heartless Summoning

Creature spells you cast cost {2} less to cast.
Creatures you control get -1/-1.

Zur the Enchanter

Flying
Whenever Zur attacks, you may search your library for an enchantment card with mana value 3 or less, put it onto the battlefield, then shuffle.

Moderation

You can't cast more than one spell each turn.
Whenever you cast a spell, draw a card.

Folk Hero

Commander creatures you own have "Whenever you cast a spell that shares a creature type with this creature, draw a card. This ability triggers only once each turn."

The Sibsig Ceremony

Creature spells you cast cost {2} less to cast.
Whenever a creature you control enters, if you cast it, destroy that creature, then create a 2/2 black Zombie Druid creature token.

Copy Enchantment

You may have this enchantment enter as a copy of any enchantment on the battlefield.