Monster Effect You can only use the 2nd monster effect of this card's name once per turn
Even so, holding off to attack might work in Charizard ex's favor as its Burning Darkness attack grows more powerful as your opponent claims Prize cards
Its honestly a really solid card
When I did my review of Gatecrashs flavor, I noted the modern (post-1850 in the Common Era) origins of several terms used in card names, among them Five-Alarm Fire, Gridlock, and Smog Elemental
Even when playing multiple colors, it can be in your best interest to center your deck primarily around one or two colors, and be a little bit less reliant on the rest
The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance