Of all the FromSoftware Soulslike RPGs on the market, Elden Ring has perhaps the most comprehensive and intricate ally-summoning system for players who need an extra warm body to draw the attention of difficult enemies, and there are several NPCs players may not even realize can be summoned. Besides using Spirit Ashes or summoning in cooperative players from other worlds, Elden Ring also has fixed summon signs outside certain boss arenas players can use to call forth friendly NPCs such as the jovial walking pot Iron Fist Alexander or the soft-spoken wolf warrior Blaidd. Certain NPC summon signs, however, are harder to find than others – in some cases because they're locked behind obscure quest lines, and in other cases, because they're locked behind obscure quest lines that send players down very, very dark paths.
lowly Tarnished character to find in Elden Ring.
Like in Dark Souls, Demon's Souls, and Bloodborne, phantoms of iconic NPCs can be summoned just outside the chambers of certain boss areas in Elden Ring, a free form of cooperative aid players can access without needing to expend Focus Points or toggle the game's online mode. Most of the major cooperative NPC summon signs can automatically found in places relevant to their personal quest-lines. One example of this is Blaidd, the half-wolf warrior and servant of Lunar Princess Ranni, who can be summoned to execute his former comrade Bloodhound Knight Darriwil and summoned in the arena for the Starscourge Radahn boss fight, whose gravity magic holds Back Ranni's grand destiny. Other NPC summon signs are only triggered when a player advances their personal quest-line by triggering certain dialogues or fetching certain items; the more obscure (or sinister) these quest-lines are, the more likely players are to miss these summon signs.
In Elden Ring, Players Can Summon Millicent For Multiple Boss Fights
In the decaying wilderness of Elden Ring's Caelid region, players can encounter an ailing red-haired woman named Elden Ring's Caelid-centric Scarlet Rot infection into remission, regaining strength and lucidity. Invigorated and newly motivated, Millicent embarks on a quest to discover her origin - a quest that if completed will generate several useful summon signs in the mid-to-late game areas of Elden Ring.
Besides gifting Millicent her Unalloyed Gold Needle, players can also bestow a Valkyrie's Prosthesis upon her, a golden limb found deep within the Shaded Castle area of the Altus Plateau region. Before gifting her this prosthesis, Millicent can be summoned for the Magma Wyrm Makar boss fight on the Ruin-Strewn Precipice; after giving her this prosthesis, Millicent can be summoned to slay the Godskin Apostle, Draconic Tree Sentinel, and Black Blade Kindred mini-bosses in Elden Ring, each located on a route to the Royal Capital, and from there to the Forbidden Lands, Consecrated Snowfield, and Haligtree. In combat, the Millicent summon wields a curved blade and frequently unleashes the multi-slash Waterfowl Dance iconically used by the hardest boss in Elden Ring, Malenia, Blade of Miquella.
In Elden Ring, Players Can (Briefly) Summons Patches For The Radahn Boss Fight
The boss fight against 
Starscourge Radahn, the culmination of a festival of war organized by the Witcher Hunter Jerren NPC, takes the NPC summoning mechanic of Soulslike games up to 11 in Elden Ring. The game lets players repeatedly summon unfamiliar and familiar allies like Blaidd to battle the red-maned, gravity-controlling Demigod. Besides player-friendly NPCs such as Iron Fist Alexander or mute NPCs such as Great Horned Tragoth, players can also summon 
Patches (NPC), the cowardly, fast-talking, and hairless FromSoftware NPC that has been backstabbing players and kicking them off ledges since Demon's Souls.
Players will easily lose track of Patches after summoning him, though. Once he catches sight of the enormous Starscourge Radahn, he immediately cancels his own summoning and returns home. It's an on-brand move for Patches, and one - given the threat Radahn poses - he can't really be blamed for.
Elden Ring Players Can Summon Dung Eater In Mohg's First Boss Fight
Not many players of Elden Ring ever get the chance to summon the NPC called The 
Dung Eater for a boss fight, mainly because unlocking his summon signs require completing one of the darkest and most evil quests in the game. Personality-wise, the Dung Eater is a piece of work, obsessed with murdering people and defiling their corpses in order to infect them with a curse that will follow their souls from reincarnation to reincarnation. The Dung Eater's quest-line only moves forward if the player brings Seedbed Curses to his physical form, located within a prison in the Subterranean Shunning-Grounds beneath Leyndell, Royal Capital.
Finding the Dung Eater's cell in Elden Ring, among other things, triggers the appearance of his summon sign outside the boss room for Mohg, the Omen. Alternately, if the player force-feeds the Dung Eater a potion from the creepy Preceptor Seluvis, the Dung Eater will be transformed into a living puppet the player can summon using special spirit ashes - a fate worse than death even for a being as defilement-obsessed as he.
Elden Ring Players Of The Frenzied Flame Can Summon Shabriri For The Godfrey Fight
In the Mountaintop of the Giants area of Elden Ring, players can encounter the being known as Three Finger's Frenzied Flame who has possessed the corpse of another NPC called Yura. Shabriri, soft-spoken, eloquent, and utterly unhinged, urges the player to avert Melina's act of self-sacrifice by imbuing themselves with the power of the Frenzied Flame, bestowed by the Three Fingers entity sealed away beneath Leyndell. If the player does become the Lord of Frenzied Flame in Elden Ring, Shabriri will become an NPC players can summon outside the boss arena for Godfrey, The First Elden Lord, wielding both Yura's Nagakiba katana weapon and Shabriri's own Frenzied Flame Incantations.
