If you want your design to fit into the deck box, the maximum thickness is 4mm
The player with the biggest creature on the board or the player who can beef up their creatures with combat tricks will often gain advantages as their creatures survive combat with much smaller ones
Weakness: Water (x2) Resistance: none Retreat: 2 Slowpoke Water HP70 Basic Pokemon [C] Rest: This Pokemon is now Asleep
But Golden Packs are a meaningful step toward making the Arena economy more player friendly, and Wizards deserves a lot of credit for this, despite all of their failings in the past
Niblis of Frost 2UU Creature Spirit 3/3 Flying Prowess ( Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever you cast an instant or sorcery spell, tap target creature an opponent controls
It can have different colors than your commander creature, and your color identity is determined by the color pips on both your choose a background commander creature and your commander background