Rekindling Phoenix is as good of a card as it ever was, maybe even better now with less overall exiling effects being played than previously with the Gods leaving the format
If youre good at stocking your graveyard, you might want the newer, cheaper option instead
As stated, there are three different types of cards that may be included, Characters (Glimmers), Items, and Actions
The introduction of location cards adds a whole new game mechanic for players to learn, and present large changes to strategies
You could make Vedalken Squirrel-Whacker a 3/5 and change the die roll result to 2, make it a 2/3 and change the die roll result to 5, or leave everything how it was
Activate only once and only if you control an Urza's Mine, an Urza's Power-Plant, and an Urza's Tower