Sylvester’s Enhanced Familiar

With this spell the caster can temporally unlock latent magical potential within your familiar’s form. Infused with planar energy from its plane of its origin the familiar grows to medium size and gain the following bonuses, for as long as the caster keeps concentrating on the spell.

• The familiar gains 30 temporary hit points, and if reduced to 0 hit points while in this form. The spell ends immediately and the familiar reverts to its original form, with 1 hit point remaining regardless of any excess damage received.
• The familiar can use the attack action, and the damage is increased to a d8, when using its own natural weapons.
• The familiar gains a bonus to attack rolls, proficient skill checks, ability saves, and damage rolls equal to the caster’s proficiency bonus.
• Taste of power (Lower planes only): The familiar gain the ability to cast Eldritch Blast as a level 1 caster.
• Fey step (Fey only): As a bonus action, the familiar turns invisible until it makes its next attack or delivers a touch spell. It will grant advantage on the next attack or disadvantage against the delivered spell. This ability recharges on a result of 6 on a d6
• Healing tears (Upper planes only): As an action the familiar cries glowing teas over a wounded creature, and the creature recovers 1d8 + (caster spellcasting modifier) hit points. If the target is unconscious, it recovers 3d8 + (caster spellcasting modifier) instead (recharges on a roll of 6 on a six-sided die).