Secret Lair Drop

Dovescape

({W/U} can be paid with either {W} or {U}.)
Whenever a player casts a noncreature spell, counter that spell. That player creates X 1/1 white and blue Bird creature tokens with flying, where X is the spell's mana value.

RNA Guild Kit

Whenever a player casts a noncreature spell, counter that spell. That player creates X 1/1 white and blue Bird creature tokens with flying, where X is the spell's converted mana cost.

Dissension

({WU} can be paid with either {W} or {U}.)
Whenever a player plays a noncreature spell, counter that spell. That player puts X 1/1 white and blue Bird creature tokens with flying into play, where X is the spell's converted mana cost.