this Magic item is 5 ft. tall, weighs 80 lbs., and is carved to have various Runes that function similarly to a Glyph of Warding. as an action, you can activate it by speaking its command word. activation causes it's runes to glow and for the stone to float up to 2 ft. into the air. you can cast a spell (including cantrips) onto the stone and instead of it acting out as usual, the spell is absorbed into one of the runes on the stone and is stored. a stored spell can be cast without material components by the stone in one of three ways: Active casting: the spell is casted at the nearest target within range that the caster has designated, Inactive casting: the spell is casted either at a point on itself or to a person touching it if the stone is touched, Passive casting: a general effect of the spell is constantly on itself but at a shorter range (I.e. Fire for Fireball, Groups of undead for Animate Dead or Create Undead, Charming for Charm Person, Healing for Healing and Resurrection spells etc..). to have a spell be casted multiple times by the stone, it must be casted onto the stone for an equal amount of times. when left for a considerable time, the stone descends a few inches and it's runes become noticeably dimmer. the user can speak its command word (no action required) to activate or deactivate the stone. when deactivated, the stones' ability can not be triggered by any means. when a spell is activated by the stone, it rises up to 3 ft. and its runes glow before it is casted. to identify a spell within the stone you must either make an Intelligence (Arcana) check with a DC equal to 10 + the spell level or cast Identify on the stone. the Runestone has 40 Hit Points, 18 Armor Class, and resistance to all damage and immunity to bludgeoning, slashing, and piercing damage from weapons that aren't adamantine.

(Uncommon): a Spell of 2nd-level or lower can be casted and stored in the stone. it can only use a spell slot of 2nd-level or lower and can only be casted a maximum of 3 times before the spell runs out of power. when using passive casting, the effect is casted at 1/4th the distance.

(Rare): a Spell of 4th-level or lower can be casted and stored in the stone. it can only use a spell slot of 4th-level or lower and can only be casted a maximum of 3 times before the spell runs out of power (5 times for a spell of 2nd-level or lower). when using passive casting, the effect is casted at 1/2 the distance.

(Very Rare): a Spell of 7th-level or lower can be casted and stored in the stone. it can only use a spell slot of 7th-level or lower and can only be casted a maximum of 3 times before the spell runs out of power (5 times for a spell of 4th-level or lower, 9 times for a spell of 2nd-level or lower). when using passive casting, the effect is casted at full distance.

(Legendary): a Spell of 9th-level or lower can be casted and stored in the stone. it can only use a spell slot of 9th-level or lower and can only be casted a maximum of 3 times before the spell runs out of power (5 times for a spell of 7th-level or lower, 9 times for a spell of 4th-level or lower, 15 times for a spell of 2nd-level or lower). when using active or passive casting, the effect is casted at twice the distance.