Eidolons

Razor-sharp bite attack (1d6; 1d8 Large; 2d6 Huge), primary. If the eidolon already has a bite, deals 1½× Str on damage rolls.

Two claw attacks (1d4; 1d6 Large; 1d8 Huge), primary. Applied to one pair of arm limbs; does not add extra attacks if the base form already has claws.

Climb speed equal to base speed. Each additional selection increases climb speed by 20 ft.

Breathe underwater indefinitely.

One natural attack's damage die increases one step. Each selection applies to a different attack.

+2 natural armor. Can be taken once per 5 summoner levels.

All natural attacks treated as magic for DR. At summoner level 10+, also treated as the eidolon's alignment.

Combat-trained mount; eidolon must be at least one size larger than rider.

Two pincer attacks on one limb pair (1d6; 1d8 Large; 2d6 Huge), secondary. Grants +2 CMB to grapple if Grab is also selected.

Full attack after a charge.

One attack type pulls target 5 ft. closer on a free CMB check. Each selection applies to a different attack type.

One attack type pushes target 5 ft. away on a free CMB check. Each selection applies to a different attack type.

One attack gains +5 ft. reach. Each selection applies to a different attack.

Resist 5 vs. one energy type (acid, cold, electricity, fire, sonic). Each additional selection: +5 resist (same or different type), max 15 per type without Immunity.

Scent special quality; detects opponents within 30 ft. by smell (60 ft. upwind, 15 ft. downwind).

+8 racial bonus to one skill. Each selection applies to a different skill.

Devastating slam attack (1d8; 2d6 Large; 2d8 Huge), primary. Requires arm limbs; replaces the claws from the base form if desired.

Stinger on tail (1d4; 1d6 Large; 1d8 Huge), primary. Each additional selection adds another sting.

Swim speed equal to base speed. Each additional selection increases swim speed by 20 ft. Does not grant water breathing.

+2 racial bonus on Acrobatics (balance). Required by Sting and Tail Slap.

Tail bash attack (1d6; 1d8 Large; 2d6 Huge), secondary. Each additional selection adds another tail slap.

Tentacle attack (1d4; 1d6 Large; 1d8 Huge), secondary. Each selection adds another tentacle.

Two wing attacks (1d4; 1d6 Large; 1d8 Huge), secondary.

+2 to one ability score. Can be applied once per ability score per selection.

When grappling via Grab, deals additional damage equal to the grabbing attack's damage.

All natural attacks deal +1d6 energy damage (acid, cold, electricity, or fire).

Fly speed equal to base speed. Maneuverability: Good (Medium or smaller), Average (Large), Poor (Huge). Wings may also qualify for Wing Buffet.

Horn gore attack (1d6; 1d8 Large; 2d6 Huge), primary.

Free CMB grapple attempt on hit. Choose one attack type (bite, claw, pincers, slam, tail slap, or tentacle). Each selection applies to a different attack type.

Immunity to one energy type (acid, cold, electricity, fire, or sonic). Each selection applies to a different type.

Additional pair of limbs. Arms: gives hands (no extra attacks without other evolutions). Legs: +10 ft. base speed per pair.

Poison attack on bite or sting (injury; Fort negates; 1/round for 4 rounds; 1d4 Str; cure 1 save; DC = 10 + ½ HD + Con).

2 rake attacks (1d4; 1d6 Large; 1d8 Huge) when grappling, primary. Delivered each time the eidolon succeeds on a grapple check.

When two claw attacks hit the same target in one round, deal claw damage as bonus damage.

Full-round overrun vs. targets one size smaller; no CMB check needed; target can attempt Ref (DC = CMB) for half damage.

Tremorsense 30 ft. while both eidolon and target are on the ground.

Free CMB trip attempt on a successful bite attack.

Simple Weapon Proficiency. Spending 2 additional EP (4 total) grants all martial weapon proficiency as well.

Pinpoints creature locations within 30 ft. without sight; those creatures still have total concealment.

Burrow speed = ½ base speed through dirt, clay, sand, and earth. No tunnel left behind.

DR 5/[chosen alignment]. Must choose an alignment opposite to one the eidolon possesses.

Opponents within 30 ft. shaken for 3d6 rounds (Will negates; DC = 10 + ½ HD + Cha).

If the eidolon starts its turn with a bitten creature, it may CMB to swallow it (up to one size smaller); swallowed creature takes bite damage + 1d8+Str per round.

Spinnerets; ranged touch webbing (8/day) entangles targets up to one size larger; can also anchor and move across web.

Ignores darkness, invisibility, and concealment within 30 ft. (requires line of effect).

30-ft. cone or 60-ft. line; 1d6/HD damage (energy type chosen at selection); Ref half; usable 1/1d4 rounds.

Fast healing 1; heals 1 HP per round.

Grow to Large size: +8 Str, +4 Con, +2 natural armor, −2 Dex; −1 size penalty to AC/attacks; +1 bonus to CMB/CMD; attacks scale up one die step.

SR = 11 + summoner level. Does not apply to spells cast by the summoner.