My Deck is About a Seven (Unknown Event #CR14a)

My Deck is About a Seven {3}{R}

Instant

Choose a number between 6 and 8. My Deck is About a Seven deals that much damage to target creature.

Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny