Flux Blastseeker

The blastseeker can create an additional effect immediately after casting a spell. Roll a d6 to determine the effect: 1-3. The blastseeker teleports, swapping places with a creature it can see within 30 feet of it. 4-6. The blastseeker and each creature within 10 feet of it must succeed on a DC 16 Constitution saving throw or take 11 (2d10) thunder damage.

The blastseeker's innate spellcasting ability is Intelligence (spell save DC 16, +8 to hit with spell attacks). The blastseeker can innately cast the following spells, requiring no components other than its Izzet gear, which doesn't function for others:

3/day each: mage armor (self only), scorching ray

1/day each: banishment, cone of cold, dimension door, fireball, ice storm

Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 3 (1d6) bludgeoning damage, or 4 (1d8) bludgeoning damage if used with two hands.