Continue the subset of cards that don't care if you connect with an opponent, but rather look to any combat damage dealt, so these become super effective: Five-Alarm Fire, Holy Avenger, Sword of Hours, Lost Jitte, Tamiyo, Field Researcher, and the infamous Umezawa's Jitte
Pick right storage for lasting protection
Legality depends on the tournament format -- Undercity Card // The Initiative Card can be legal in some formats and banned or restricted in others
Cards are valued according to their TCGPlayer Market Price, representing what you might pay for any (first edition, where applicable) copy of the cards below
One PSA 8 No Rarity Zard or two PSA 10 Basic Japanese Zards thats an easy choice IMO
Scarlet ex has that advantage: its best cards and product identity point in the same direction