They have no pros or cons but instead are fuel for whatever type deck you decide to run
Three recent sets lead the conversation: Phantasmal Flames, headlined by Mega Charizard X ex Ascended Heroes, led by Mega Gengar ex Perfect Order, built around Mega Zygarde ex Most Expensive Cards in Phantasmal Flames Phantasmal Flames (ME02) landed on November 14, 2025, and its standout is the Mega Charizard X ex
In particular, even though it is a subdued monster, it does not have an active means of obstruction, and the trap used as the means of obstruction for the theme is the same as the means of restoring the front line, so simply removing it and re-deploying it will interfere with that turn
To collect these powerful cards you have to beat both stories
Should that player then place first place at another event afterwards, their updated total CP gained from League Challenges would be 60 CP