Quandrix, the Proof

Menace Opus — Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature. If five or more mana was spent to cast that spell, add an amount of R equal to this creature's power.

Return target nonland permanent card from your graveyard to the battlefield. Paradigm (Then exile this spell. After you first resolve a spell with this name, you may cast a copy of it from exile without paying its mana cost at the beginning of each of your first main phases.)

Haste This creature enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Flash Flying, vigilance This creature enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Once during each of your turns, you may cast an instant or sorcery spell from your hand without paying its mana cost.

This creature can't block. Whenever this creature attacks, each opponent loses 1 life and you gain 1 life. 1B, Exile an instant or sorcery card from your graveyard: Return this card from your graveyard to the battlefield.

Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life. 1BG, T, Sacrifice a creature: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.

Vigilance Repartee — Whenever you cast an instant or sorcery spell that targets a creature, create a 1/1 white and black Inkling creature token with flying.