Kanzenshuu

Immortality already confers invincibility if the dragon is the one making you immortal. Other characters can't die from natural causes, but can still die via murder or suicide. But if a dragon makes you immortal because you wished for it, NOTHING can kill you. AT ALL. As seen with Future Zamasu, eve...

Okay, here's a hypothetical battle between immortals:

Garlic Jr. with the Makyo Star vs. Future Zamasu.

Garlic Jr. can't open the Dead Zone.

Who wins?

I don't think Future Zamasu can be beaten by ANYONE in a straight fight. Same with Garlic Jr.. If you're trying to beat an immortal in a straight fight, where the immortal doesn't do something stupid like trapping himself, and you can't imprison or incapacitate him, you WILL lose. A fight between so...

I think Garlic Jr. could be redeemable, IF he was convinced it was pointless to carry out a grudge held by his father. Piccolo Jr. was able to realize this.