You want a creature to have double strike because you get the first strike damage and then another hit. Both keywords change the damage step, but double strike brings extra value and damage
An incredibly overpowered card, [c]True-Name Nemesis[/c] gives its controller protection from basically anything their opponent has
There should also be a general theme of Blueberry Academy, the school from Unova featured in the Pokmon Scarlet & Violet game DLC, The Indigo Disk, in the card art, trainers, and Pokmon
Understanding card interactions, turn sequences, and specific game mechanics can provide a significant advantage
Green can provide sweet artifact hate to shut down aggressive combo decks while black offers excellent tutors, hand disruption, and removal