Rerolling for Mythics

Champion Chests (25 cost per reroll) are the best way to use rerolls for Mythic Parts

• Legendary Chest have a higher probability of rerolling Mythics (20% vs 15%), however their much higher cost of rerolling (50 vs 25) makes it less optimal
• Epic Chests cost less to reroll (10 vs 25), but the lower cost does not justify the much lower probability of Mythic Parts (3% vs 15%)
• Common(1), Uncommon(2) and Rare(4) chests are not known to provide Mythic Parts

Chest	Cost of Reroll	Prob(Mythic)	Cost/Mythic
Epic	10	3%	333.33
Champion	25	15%	166.67
Legendary	50	20%	250.00