Seek two nonland cards, then put a card from your hand on the bottom of your library.

Flying, vigilance (This creature can't be blocked except by creatures with flying or reach, and attacking doesn't cause this creature to tap.)

Whenever you cast an instant or sorcery spell, Spellrune Howler gets +2/+2 until end of turn.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Destroy target artifact and target enchantment.

Kicker (You may pay an additional as you cast this spell.)

Flying

When Tempest Owl enters the battlefield, if it was kicked, tap up to three target permanents.

Draw three cards. Then discard two cards unless you discard an artifact card.

When Trial of Knowledge enters the battlefield, draw three cards, then discard a card.

When a Cartouche enters the battlefield under your control, return Trial of Knowledge to its owner's hand.

If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Whenever this creature enters the battlefield or transforms into Wildsong Howler, look at the top six cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)