Fourth Stage of Magic Design

Whenever an opponent casts their first spell each turn, that player exiles the top card of their library. If it's a nonland card, you may cast it without paying its mana cost.

You may look at the top card of your library any time.

You may play lands and cast spells from the top of your library.

Once during each of your turns, you may cast a spell from your hand or the top of your library without paying its mana cost.

Flying

As Alhammarret enters, each opponent reveals their hand. You choose the name of a nonland card revealed this way.

Your opponents can't cast spells with the chosen name (as long as this creature is on the battlefield).

If there are three or more Lesson cards in your graveyard, you may cast this spell as though it had flash.

This spell costs less to cast for each noncreature, nonland card in your graveyard.

Ward

Whenever you cast your second spell each turn, copy it, except the copy isn't legendary. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)

Whenever a player casts an instant or sorcery card, exile it. Then that player copies each instant or sorcery card exiled with this enchantment. For each copy, the player may cast the copy without paying its mana cost.