There are plenty of cards that weren't designed to have 3 power, much less 8, but Forgefire will give it to them anyway
I try to keep these Standard-legal and use these to teach the next generation of Magic players in my LGS every last Friday of the month
For example, if there are two +1/+1 counters on Aerith Gainsborough and it gets three -1/-1 counters, you'll put two +1/+1 counters on each legendary creature you control when Aerith Gainsborough's third ability resolves.
Un-set cards like Jack-in-the-Mox and Mox Lotus push the boundaries of Magic rules, creating powerful effects
Yusri, Fortune's Flame also has a coin flip ability, but the way this ability is designed manages to make you both try to avoid losing flips while also flipping as many coins as you can
Flame-Wreathed Phoenix $10 Oh hey, look, its a punisher card