It can attack, although not the turn it comes under your control
Classes have proven themselves popular for WotC to reuse their designs, like they did in Bloomburrow and TMNT, and I suspect that well see more of them in future Magic sets
Sanderson, famous for fantasy series like The Wheel of Time, Mistborn, and The Stormlight Archive, has long been vocal about his interest in Magic: The Gathering, and seems to have stepped up his involvement in recent years - previewing a card for the recent Tarkir release, for instance
Extended Art One Rings cost about $65-80 apiece
Again, the early sets were not numbered
Archon of Absolution 3W Creature Archon 3/2 Flying Protection from white (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything white.) Creatures can't attack you or a planeswalker you control unless their controller pays 1 for each of those creatures