Increase one ability score by 1 and a different ability score by 2 

Ixixachitl are considered Large sized creatures. As a
Large size creature you take up 10ftx10ft of space, you have
proficiency in any weapon with the Heavy keyword and may
use Athletic based skill checks against targets up to the Huge
size category. You additionally have disadvantage on
Dexterity checks that require the use of small tools and fitting
through spaces that are easy for Medium size or smaller
creatures to fit through.

You have Darkvision out to a range of 60 feet 

You can breathe both air and water As a bonus action when near an object that would be considered half cover you may use the Hide action
with advantage. If a target fails to locate you it may not roll again to locate you until you move. You retain the benefits of False
Appearance while grappling a target with your wings.

Your creature type is Abberation

You may choose to use your Wings or Tail when attempting to grapple a target. If you successfully grapple a creature
with your wings, your fly speed is reduced to 0, the target is blinded, silenced and will suffocate unless you choose to let it
breathe. While grappling a target with your tail, you retain your fly speed and the grappled target takes 1d4 Bludgeoning
damage + Strength at the start of its turn.
While grappling a target with your wings or tail you can spend a bonus action to apply the effects of grappling with both your
wings and tail until the start of your next turn. Your fly speed is reduced to 0 and the target has disadvantage to escape your grapple.

You can speak read and write Common, undercommon and Deep speech

While grappling a creature, as a reaction to taking damage you instead take half damage dealt to you
rounded down and your grappled target takes the other half.

You have a natural Bite attack that deals 1d6 Piercing damage + Strength. While grappling a target with your wings you may use a Bite attack with advantage.

While only wearing up to light armor you have 40ft of unrestricted flight. While wearing Medium or Heavy armor
you have 30ft of unrestricted flight.