Anything that takes out an opposing threat is nice, as are looting/card draw triggers or those which chain into further reanimation these are effects we need all the time anyway, and the more we can overlap them with this other core function of huge deadly attacker, the more consistent we will be
Mew ex can be obtained from Mew pack in the Mythical Island set
But a card that drops decent stats AND banishes an opposing character is all about board presence
Red Red has access to a lot of damage-based removals, which is normally very good in 60-card constructed because Lightning Bolts and Shocks are very efficient
However, Ob Nixilis, the Adversary, uses Casualty X
Other chase cards include die-cut cards, pop-up cards and my personal favourites and grail, the famous hologram cards