They start high, fluctuate somewhat while they are the current and latest set, and then level out months later
Their abilities are extended, allowing players to move between worlds with the right crystal, move through time, or even bind a summoned monster
Whenever a dragon you control is targeted, this dragon automatically zaps that player for 3 damage
offsets the raw power of a one-cost hard counter by making you jump through a hoop but one blue/black decks in particular are already set up to achieve on turn one
It also adds an interesting layer to something like a Veteran Explorer or New Frontiers
Omnath, it turns out, is also among the best Commander cards mtg has, granting access to four of the five colours