Pailiah, Herald of Truth

Vigilance, ward {3}

Whenever you cast a Truthwatcher, Lightweaver, Edgedancer, or Spren spell from your hand, look at the top X cards of your library, where
X is that spell's mana value. You may cast a spell with mana value less than X from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.

based on Kiora, Sovereign of the Deep