Ary, Deputy of Divination

In the Coven — Creatures you control that are blue have hexproof, the same is true for white and vigilance, and black and fear.

Reveal the Truth — Whenever you attack, you may tap Ary and pay up to X mana, where X is the number of attacking creatures you control. Create a Clue token for each mana spent this way. Each attacking creature you control gains +Y/+0 until end of turn, where Y is the number of clues you control.