all serialized mtg cards Misprint : r/mtg A Collector's Guide to Magic:

You can return a Sol Ring to your hand to stick a Platinum Angel into play right before you are about to die

What cards should I pick up for my decks

You can have them enter the battlefield with haste and trample, which provides a huge and immediate threat that can swing a race, kill quickly, or surprise attack a planeswalker or battle

In case youre wondering how this blue creature works, it synergizes with spells that create copies, as those are one of the only ways to have spells on the stack that werent cast

If a die is rerolled, the original roll essentially never happened: it doesn't cause any abilities to trigger, and no effect that cares about die rolls will consider it