The only downside for Zareth is if you want to use its second ability, you have to somehow get it into your hand, which can be done with ninjutsu cards like Prosperous Thief, trading them back and forth from your hand
There are multiple parts to each players turn in Magic, and those phases are the rails on which the entire game system runs
However you're planning your Prerelease, scheduling early is the best way to boost attendance
Probably it is better than Ball Lightning but it is far less cool than my sexy original Ball from the Dark
Learn more: Power of Faern Iymrith, Desert Doom Known as the Dragon of the Statues and the Doom of the Desert, the ancient blue dragon Iymrith commands an army of gargoyles and has studied magic for centuries in the hope of one day transcending her physical form and becoming a god
Slightly off topic, did Magic the Gathering copy holofoil cards from Pokemon