lorcana card back sleeves Ravensburger Disney TCG Sleeve Pack – I2I | 65 Protective for TCG Decks and you’re invited Disney Lorcana TCG Japanese Version

It seems that these numbers will be used to challenge other characters and not to attack your opponents life total like in Magic: the Gathering

Akroma's Will Ancient Copper Dragon Atraxa, Grand Unifier Gix, Yawgmoth Praetor Kinnan, Bonder Prodigy Najeela, the Blade-Blossom Nyxbloom Ancient Purphoros, God of the Forge Ragavan, Nimble Pilferer Ranger-Captain of Eos Rhystic Study Thrasios, Triton Hero Urza, Lord High Artificer Vial Smasher the Fierce Yawgmoth, Thran Physician

Five mana for a 3/5 Reach isnt too bad, and the effect is just a mostly-better Morbid Opportunist trigger

You should also watch out for the self-destruct