I imagine you want to make cut-ins for the abilities, right? Or to show something like this when you cast an ability. Use common events, there you create your scene that will play when using the ability, BUT BE VERY CAREFUL HERE, don't use the default option in the ability effects window, you'll be using Yanfly plugins. Core, battle core, skill core y battleSeq1.
The ActSeq1 plugin notes tell you how to create your script so that it includes your common event and then adds the damage or healing from your ability. And that's it. If you have more specific questions, send a message here. UWU.