Grinch

Your bad mood has achieved an almost legendary status and has become known far and wide. You gain the following benefits:
Grumpy. You have advantage on saving throws against being charmed.
Miser. When a creature within 60 feet of you rolls a 20 on a d20, you can force it to reroll the die, and then use the new roll. Once you use this ability, you must finish a long rest before you can use it again.
See?! I Told You! When an allied creature within 60 feet of you rolls a 1 on a d20, you gain temporary hit points equal to twice your proficiency bonus. Any remaining temporary hit points are lost after 1 hour.