That makes it pretty situational, but if you happen to draw Scream Tail ex in your opening hand and get the chance to use Scream, you'll prevent your opponent from using any Supporter cards during their next turn
The order of tutor targets usually is as follows: Stage 1: Diplomatic Immunity & Vanishing/Flickerform to avoid spot removal and mass removal
Max Blaze is also an excellent energy recycling tool, moving Energy Cards from the discard pile directly to Pokmon on the bench, ready to be used again right away
Avatar Yangchen is no slouch, either
Edge of Eternities is one of the few times charge counters are a primary mechanic found in a set, even having an entire Commander precon built around them
Luckily for us, TCGPlayer has a useful infographic of the pull rates based on opening over 8000 Obsidian Flames Booster Packs