Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Counterspell

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Chulane, Teller of Tales

Vigilance
Whenever you cast a creature spell, draw a card, then you may put a land card from your hand onto the battlefield.
{3}, {T}: Return target creature you control to its owner's hand.

Command Tower

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.