If one of them resolves, it will remain in effect until the game ends, Tenth District Hero leaves the battlefield, or some subsequent effect changes its characteristics, whichever comes first
I really love Commander, and building decks has always been one of my favorite hobbies throughout my entire tenure with Magic
Manufacturer's Suggested Retail Price (MSRP) does a lot to regulate the costs, so retailers have less flexibility to set prices on booster boxes based on relative value and scarcity
Watermark: Phyrexian Illustrated by Adrian Smith Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
Luckily for us, TCGPlayer has a useful infographic of the pull rates based on opening over 8000 Obsidian Flames Booster Packs
These arts were used on Secret Lair reprints of the Theros Gods