The Assistant, Strategist

Vigilance, Flash

When The Assistant enters, all creatures you control gain Hexproof until the end of turn.

At the beginning of your upkeep, you may give
a creature you control hexproof until the end of turn. When you do, you may pay {6}. If you do, you may cast spells with mana value X or less from your hand without paying the mana cost, where X is the chosen creature's mana value.