Omniscience

Enchant land When this Aura enters, draw a card. Enchanted land is an Island.

Enchant creature Enchanted creature gets -2/-2. At the beginning of the upkeep of enchanted creature's controller, that player loses 2 life.

As this enchantment enters, choose a creature type. Whenever a creature you control of the chosen type enters or attacks, draw a card.

Nonbasic lands are Mountains.

Whenever a spell or ability an opponent controls destroys a noncreature permanent you control, you may destroy target permanent that opponent controls.

1U, Discard a card: Draw a card. 1U, Sacrifice this enchantment: Draw a card.

At the beginning of your upkeep, if you have four or more creature cards in your graveyard, you may return target creature card from your graveyard to your hand.

Whenever a player casts a spell, that player discards a card.