Bant mages still call to the heavens for aid, but angels are not the only ones who answer.

Wargate

Search your library for a permanent card with mana value X or less, put it onto the battlefield, then shuffle.

The List

Alara Reborn

Search your library for a permanent card with converted mana cost X or less, put it into play, then shuffle your library.

A permanent card is an artifact, creature, enchantment, land, or planeswalker card.

You may always find a permanent card with mana value 0. (If X is 0, that's all you can find.) Cards with no mana cost (such as land cards), cards with mana cost {0}, and cards with mana cost {X} all have mana value 0.