In Disney Lorcana, sapphire cards are strongly associated with the attributes of intelligence and resourcefulness, featuring characters or alternative versions of them who are known for using their brains to get out of trouble
Count on Luck is the red Phyrexian Arena
Sell your Buried Alive (1673 - Bring Out Your Dead
This works really well with some cards weve looked at like Deekah, Fractal Theorist, and Minn has the stat buff to make those cards shine
Its a careful balancing act, but these decks didnt quite nail it in my opinion
For example, when Boon-Bringer Valkyrie enters the battlefield, you can either put a +1/+1 counter on Boon-Bringer Valkyrie itself, or you can put a +1/+1 counter on another creature and have that creature gain flying, first strike, and lifelink until end of turn