Lucas, Molded Mastermind

Ward—Sacrifice a nonland permanent
Whenever an opponent draws a card outside of their draw step, they get a Poison counter and discard a card at random.
Whenever an opponent casts a spell from exile or their graveyard, create a face-down Trap token.
Sacrifice a Trap token: Choose one at random —
• Counter that spell.
• Gain control of that spell. You may choose new targets.
• Deal damage to that spell’s controller equal to its mana value.

“You figured out my little puzzle? Too bad,