Udexon's Arcane Banditry

You cloak yourself in the magic of the Feywilds, drawing it's mischievous nature in preparation to seize control of spells as they form or persist.

While this spell is active, you can use your reaction when you see a creature casting a spell within 60 feet of you to attempt hijacking it. You make an ability check using your spellcasting ability (DC is equal to opposing spellcaster spell save DC). On a success, you redirect the spell — choosing new targets, a new area, or altering its trajectory within the spell's normal parameters. If it is a self-targeted spell, you instead cause it to fizzle (the spell is countered).

Additional, you can use your bonus action to perform one of the following:

1. Usurp Concentration:

You to attempt to hijack an ongoing concentration spell. You make an ability check using your spellcasting ability contested with the original caster's ability check with their spellcasting ability. On a success, you become the new source of concentration for the spell and may utilise the spell's options as if you casted it should it have any. 

2. Relocate Persistent Magic:

If there is an ongoing, non-concentration area effect spell (such as Symbol, Grease, etc.) that you can perceived within 60 feet of you, you can move its center up to 30 feet in any direction.