The Elder Frog

The pond on the forest calls you. The Frog songs fill your ears. the Elder Frog wants you by some reason. enter the pound.. you know you need power...

Expanded Spell List

The Elder Frog lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Fiend Expanded Spells

Spell Level	Spells
1st	Entangle, Jump
2nd	Frog Rain, Earthbind
3rd	Tidal Wave, stinking cloud
4th	Frog Storm, Control Water
5th	Commune with Nature, Contagion

Bless of the Frog Body

Starting at 1st level, you gain resistance to poison damage and poison condition, or imunity if you are already resistant.
Your jumping distance is dobled you only take falling damage if you fall from higher than 25ft.
your attacks, spells and other features ignore poison damage resistance.

Giant Frog Bless

Starting at 6th level, You can by the power of your patrion transform into a giant frog until you desmiss it or your hp reach 0. while on this form you use the giant frog stat block but you retain spellcasting and class features. 

your Giant Frog hp is equal to 10 + 5 x Warlock Level. and your bite deals an extra 2d10 poison damage. your bite grapling DC is equal to your spellcasting DC

Once you use this feature times equal to your proficency bonus, you can’t use it again until you finish a short or long rest.

Elder Frog Poison

Starting at 10th level, You deal half damage to creatures imune to poison damage. furthermore creatures imune to the poisoned condition are affected by your poison, however they make their saving throws with advantage.

Your skin becames porus and poisonous while grapling or being grapled you deal 2d10 poison damage to the creature grappled by or grapling you at the start of your turn. 

In adition you can as a bonus action coat weapons whit poison, those weapons deal an extra 1d10 damage for 1 minute, or until they get clean such as by being blasted by water, or washed with a tissue.

Curse of the Frog Shape

Starting at 14th level, when you hit a creature with an attack, you can force a Wisdom saving throw, wich uses your Spell Save DC, a creature that fail this save is polimorphed into a tiny frog.
That frog has an AC of 12 and 3 hit points, it has a +1 to Dexterity based saves and skills and a -2 to all other skills and saving throws.

Transformed creatures return to normal if they take any damage you can only have one creature transformed at the same time.

You can use this feature times equal to half your proficiency bônus per long rest.