Soru Soru no mi is a devil fruit in the One Piece series that is used by one of the four emperors: Charlotte Linlin aka. Big Mom. The primary function of this fruit allows the user to steal and repurpose life energy or "Lifespan", to give life to inanimate objects (called 'homies"), substances and even intangible forces like fire and clouds.

In this mod i believe this power should function on 3 core systems that should be relatively simple to implement, as it borrows on some of the systems that concepts that already exist for available fruits. (Kage, Jiki etc.) Those three systems are: Stealing and storing "Lifespan", Animating inanimate objects using that "Lifespan" and using stored "Lifespan" to buff yourself (Size, strength, regen)

In addition to these core systems, to stay consistent with the source material, a user of the Soru Soru no mi will be able to use their own "Lifespan" (in the form of a percentage of their own health) to animate unique homies such as Zeus the thundercloud, Prometheus the sun and Napoleon the bicorne. These three homies will be important in using the other skills associated with this fruit. Allow me to give you an idea of the 8 skills i believe need to be available to a user of the Soru Soru no mi in this mod:

Soul Pocus: The user expels and steals the lifespan of all surrounding enemies. Up to 1000 lifespan can be stored, and used as a resource for other abilities.

Animate: The user spends 100 lifespan to turn blocks into homies. The health and doriki of the created homies is equal to 25% of the user's. Homies created using the user's own health are created with 50% instead. Animate can be used to restore the health of homies. 10 health for every 100 lifespan used.
SHIFT-USE: The user spends 10% of their maximum health to turn blocks into stronger homies.

Heavenly BonBon: Prometheus shoots multiple balls of fire at enemies that explode and set enemies on fire. Prometheus must be active or attached for this skill to be used.

Heavenly Fire: Prometheus launches himself at an enemy, exploding on impact and dealing damage to all enemies in range and sets them on fire. If Prometheus is attached, the user launches forward and strikes instead.

Indra: Zeus shoots a powerful bolt of lightning forward damaging and stunning enemies the bolt passes through. Zeus must be attached for this skill to be used.

Tenman Daijikai Tenjin: Zeus becomes a massive thunderstorm and continuously rains lightning that prioritizes enemies. Lightning bolts that do not strike an enemy, spawns a "living bolt" that immediately aggros onto the nearest enemy. Upon hitting an enemy, or being hit, the living bolt disappears and lightning strikes the enemy.

Maser Saber: The user combines all three unique homies into a sword that electrocutes and sets enemies on fire. Zeus and Prometheus are treated as attached while this skill is active. Napoleon must be equipped and Zeus and Prometheus must be active for this skill to be used.
SHIFT-USE: Mother Misery: All 3 unique homies combine and become a giant woman made of lightning with flaming hair. Health and doriki are equal to 75% of the user's. Zeus, Prometheus and Napoleon are treated as active while this skill is in use.

Soul Infusion: The user spends all of the available lifespan they have collected to massively increase their size, strength, durability and health regen. 10% increase per 100 lifespan used.
SHIFT-USE: The user spends all of the available lifespan they have collected to restore their missing health. Restore 10 health for every 100 lifespan consumed.

Those skills give the Soru Soru no mi user the option to overwhelm their enemies not only with numbers, but also with powerful single target and AoE elemental damage and status effects, while still giving the fruit a clear weakness in battle, where the Soru Soru no mi user is entirely dependant on their unique homies being alive. Without even one of them, Mother Misery or Maser Saber can no longer be used, and depending on the homie that was slain, the user will lose access to some very powerful skills.

To explain the unique homies being "active" or "attached", Zeus and Prometheus, upon creation, becomes their own entity. Naturally, they will always follow their creator, and will fight alongside their creator independently. Right clicking on them will allow the Soru Soru no mi user to ride them. Using shift+right click will attach them to you, by passively having them "equipped" to either of your two arms. (instead of being equipped like an item, their attachment would be a status like "Haste" or "Regeneration") Napoleon is both active and attached when he is equipped.

I trust that i have given all of you a deep insight into this fruit, and how its systems can function in the Mine MIne no mi mod for both pve content, as well as pvp content. I truly hope those in charge will see the great potential in this fruit and the suggestions i have given. Thank you for your time.