Arctic Lion

Heads Up, this weapon is cracked and not to be used in regular campaigns without heavy modifying.
this was originally made for a world with extremely powerful beings, best example is that this is
supposed to be for a level 5 character.

"A weapon from what can only be assumed to be ancient times, only ones with might as strong as stone can bond with these weapons."

You gain a +1 to attack rolls and damage

Stand Ground:

When the wielder has moved 0 feet on their turn and attack a creature, they gain +1 bonus AC at the end of their turn, if the wielder is hit on their turn after using this they gain an additional +2 bonus AC. When maximum bonus AC is reached, if you are attacked you lose all bonus AC that has been accumumlated. Moving at any point will cause you to lose all bonus AC at the beginning of your next turn.
(This has a maximum at a combined 5. Ex. +1+1+1 from moving 0 feet and attacking then +2 from being hit =+5, not going any higher)

Fate's Resilience:

You can mark up to one creature with an attack. When the creature has been marked and you are hit with an attack, the creature underthe effect will take 1d4 damage

Hi yeah me again, this next part has "Unlockable Features", these where designed for my campaign
and I recommend changing them to fit your campaign.

"Requirement (amount of times to do requirement)
Feature and description"

Gain 5 bonus AC during battle and end the battle with it five times 0/5:
Although its been short time with your new weapon, you have learnt how to properly protect yourself while standing still. During these times you have studied how oppenets move and have come up with a new technique.
Expected Outcome:
As a reaction you can attack a creature, with advantage, if they hit you on that turn while your using Stand Ground. If you sucessfully hit the creature you will instead drop to +1 bonus AC
at the beginning of your next turn instead of 0.

Help Slay A Young White Dragon 0/1:
An Arctic Lion is more powerful than an Arctic Dragon.
Adaptable Outcome:
Being not too well equiped to deal with other more adept spellcasters, your weapon has adapted to your style. If stated, then on a succesful saving throw instead of taking half damage you take none, and half is redirected towards the caster, on a failed save you instead take half the usual damage.

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Someone with a strong will. And a DM prepared to change a lot of this., Damage, Utility, Combat, Versatile, Sap