Soulsteal Is A Skript That Allows You To Steal Peoples Soul.
When You Kill Someone They Will Drop A Soul, And If You Right Click On This Soul.
You Can Gain An Extra Heart And They Will Not Be Revived Again.

But When You Die, You Will Be Put Into Spectator Mode
And Can Only Spectate As A Ghost.

Only Admins Can Revive You,
Nobody Else.

Reving Will Come In The Future, Just Not Currently.