Yep, another tiered power, appropriate for use as a tiered mutation for GammaFinder, or Power Set for FreedomFinder (both Starfinder-compatible setting hacks).

This is summoning as a power, which for balance purposes is always treated as spell-like, but the player and GM can be flexible with the nature of the power. Perhaps your genetic sorcery extends to summoning daemons… even if you would rather not deal with such creatures. Perhaps you are a fire-manipulator, and the fire elementals you summon are just forms or pyrokenesis. maybe you have a form of technokinesis and technopathy, and can turn anything into servant robots.

We’ll be touching on some of those related powers later, but for now, let’s look as summoning as a tiered power.

(art by grandfailure)

Summoning (Sp)
When you first gain the summoning tiered mutation, you must decide what type of creature you summon, from the following list: aeon, agathian, angel, archon, azata, daemon, demon, devil, elemental (select one subtype), fey plane beast, inevitable, protean, robot, or shadow creature. you are not restricted by the normal summoner requirements (you can summon demons even if you are lawful good… you poor soul).
These re summoned as the appropriate summon creature spell, obey you (regardless of alignment difference, though evil creatures will tend toward evil methods unless given orders restricting their options, even of summoned by good-aligned characters), and understand any orders you give.
Summoning grants you upgrades, which are special powers you have with your summoned creatures that acts differently than the summon creature spell. You can select from the upgrades below. Once made, these choices cannot be changed. You cannot select an upgrade more than once unless it says otherwise.
Upgrades:
Broad Summoning: You can select an additional type of creature to summon, and mix and match your summoning to include any of your allowed types.
Communication: You and your summoned creatures have limited telepathy, which only works with each other (but functions regardless of language).
Environmental: Select one environmental graft. You can apply it to any creatures you summon. The creatures gain all the abilities always granted by the graft, and any one of those sometimes granted. A given summoned creature can only have one environmental graft applied to it. You can select this upgrade multiple times. each time, you select a different environmental graft.
Language: Creatures you summon know a single language you know, fo course chocie, and can communicate in this langauge.
Lasting: You can have a single summoned creature be persistent when it is not in combat. However, if it makes an attack or is attacked, forced to make a saving throw, or takes damage, it reverts to having a duration of 1 round/level.
Variable Sizes: You can summon creatures up to one size larger, or two sizes smaller than those normally summoned by the appropriate summon creature spell. This does not impact their stat block or reach, only their actual size.
Tier 1: You can summon creatures (as summon creature I) as a full action once per day.
Tier 2: You gain one upgrade.
Tier 3: Your summoning can now act as creature summoning II. You regain the ability to use this power after you expend Resolve Points to regain Stamina Points following a 10-minute rest.
Tier 4: You gain a second upgrade.
Tier 5: Your summoning can now act as creature summoning III. You can now use this ability at any time by expending a Resolve Point. If you use this ability while any previously summoned creatures are still extant, they immediately dissappear.
Tier 6: You gain a third upgrade.
Tier 7: Your summoning can now act as creature summoning IV.
Tier 8: You gain a fourth upgrade. You can now use this spell-like ability as a standard action.
Tier 9: Your summoning can now act as creature summoning V. You gain a fifth upgrade.
Tier 10: Your summoning can now act as creature summoning VI. You gain a sixth upgrade.

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