100 rat sized zombies, I think... I can probably take out a few at a time. Not sure I could fight even one zombie sized rat... plus I like rats, they don't deserve to be dragged into this nonsense.
Would you rather:
Have the ability to rewind time so you can change events.
Have the ability to pause time, so you get shit done (or just chill) without time moving forward.
(let's say that your aging is also paused or rewound during these scenarios so that your time meddling doesn't lead to you ending up 20 years older than you should be)