Free fights

Free fights (specific mobs)	limit?	source
Lynyrd	3/day	using a lynyrd snare
Infernal Seals	10/day	variety of items; must be Seal Clubber for 5, must have nemesis quest final reward in inventory for 10.
BRICKO monsters	10/day	brickos; can copy smaller ones for more
drunk pygmy	11/day	with Bowl of Scorpions in inventory, fight ends instantly
dense liana	15/ascension	with machete equipped as weapon, fight ends instantly
Black Crayon monsters	7/day	from active artistic goth kid, shares counter with hipster; can copy for more
X-32-F Combat Training Snowman	10/day	must have a snojo
Witchess pieces	5/day	must have a witchess set; can copy for more
Protonic accelerator pack ghosts	delay of 50 adventures in-between	must have either proton-pack equipped or used almost-dead walkie-talkie to receive location
Eldritch Tentacle	n/a	if spawned via Eldritch Attunement effect, casting Evoke Eldritch Horror (1/day), or in A Science Tent after the Sssschmuck finale (1/day)
Time-spinner prank	5/day	getting pranked by another player with a time-spinner; not available in Ronin/HC
Giant rubber spider	delay of 10-20 adventures in-between	having a rubber spider used against you by another player; not available in Ronin/HC
L.O.V. Enemies	3/day	must have the Tunnel of L.O.V.E. from the heart-shaped crate iotm
Free kills (specific methods)	limit?	type	remark
Shattering Punch	3/day	combat skill	snojo skill, tradable
Replica bat-oomerang	3/day	combat item	batfellow content, costs at least one batfellow comic
The Jokester's gun	1/day	combat skill	batfellow content, tradable
Power pill	20/day	combat item	must have Puck Man and/or Ms. Puck Man
DMT fights	5/day	familiar	must have Machine Elf active, can only be in the DMT (DMT monsters by default, but can be any wanderer)
Nuclear stockpile	10/day	combat item	was only available during Crimbo 2015
Glark cable	5/day	combat item	against any non-instakillable mobs in The Red Zeppelin
Lightning Strike	n/a	combat skill	only available in Heavy Rains, dependent on path-specific lightning resource
Gingerbread Mob Hit	1/day	combat skill	gingerbread city leaderboard reward skill, tradable
Superduperheated metal	n/a	combat item	can only be obtained through the mall or 1/day in The Bubblin' Caldera
Daily Affirmation: Think Win-Lose	n/a	combat item	can only be obtained through the mall or from the New-You Club Membership Form
Other
Various sources provide means to copy a monster or turn it into a wanderer (even some free-fightable ones, as indicated above), thus bypassing limits or sometimes (when faxed) even bypassing requiring their original source. See also Copying.
Free runaways are omitted from this list on purpose. See also Run Away.
Insta-kill types that cost turns are omitted on purpose as well. See also Insta-kill.