Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Whenever an ability of equipped creature is activated, if it isn't a mana ability, copy that ability. You may choose new targets for the copy. Equip {3}

Activated abilities of creatures you control cost {X} less to activate, where X is Agatha of the Vile Cauldron's power. This effect can't reduce the mana in that cost to less than one mana. {4}{R}{G}: Other creatures you control get +1/+1 and gain trample and haste until end of turn.

Reach Whenever an opponent casts an instant or sorcery spell, create a 1/2 green Spider creature token with reach.

Whenever an opponent casts a noncreature spell, Cindervines deals 1 damage to that player. {1}, Sacrifice Cindervines: Destroy target artifact or enchantment. Cindervines deals 2 damage to that permanent's controller.

Whenever an opponent casts a blue spell during your turn, you may create a 4/4 green Elemental creature token.

Whenever an opponent casts a spell, reveal the top card of your library. If it's a creature card, put it onto the battlefield. Otherwise, you may put that card on the bottom of your library.

Whenever an opponent is dealt 3 or more damage by a single source, that player discards a card.

Whenever an opponent casts a spell, that player loses 5 life unless they discard a card.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.