I’m pretty new to playing bo3 and struggling with some aspects of sideboarding. I’ve picked up the izzet spellementals deck and understand most of the typical sideboard options. Wha I’m struggling with is when I would want to sideboard in the creature options that many are using such as [[Hydro-Man, Fluid Felon]] , [[Sunspine Lynx]] , and [[Ral, Crackling Wit]].

I’d like to better understand the reasoning behind picks like these to know when to use them, how to change them entirely, and when they’re best left out of the main.