First Aid

Secondary skills
Air Magic
Archery
Armorer
Artillery
Ballistics
Diplomacy
Eagle Eye
Earth Magic
Estates
Fire Magic
First Aid
Intelligence
Interference
Leadership
Learning
Logistics
Luck
Mysticism
Navigation
Necromancy
Offense
Pathfinding
Resistance
Scholar
Scouting
Sorcery
Tactics
Water Magic
Wisdom

First Aid
	Basic First Aid: gives control of the first aid tent to the hero, healing 40-50 1-50  points of damage to the first unit of the selected stack.
	Advanced First Aid: gives control of the first aid tent to the hero, healing 60-75 1-75  points of damage to the first unit of the selected stack.
	Expert First Aid: gives control of the first aid tent to the hero, healing 80-100 1-100  points of damage to the first unit of the selected stack.

Classes unable to learn First Aid:

(They can only acquire the skill from Scholars, Witch Huts, Seer's Huts, Events or Pandora's Boxes).

•  Death Knights
•  Necromancers

Heroes with First Aid as a specialty and a starting skill:

•   Rion the Cleric
•   Gem the Druid
•   Verdish the Witch
•   Floribert the Mercenary 

The specialty increases the secondary skill effect by 5% per hero level.

Chance to get

Out of total 112 for Shadow of Death, and of (112 + Interference chance) for Horn of the Abyss .
Banned skills change the probability.

Town	Class	Chance to learn
Castle	Knight	2
Castle	Cleric	10 (highest)
Rampart	Ranger	3
Rampart	Druid	7
Tower	Alchemist	2
Tower	Wizard	7
Inferno	Demoniac	2
Inferno	Heretic	5
Necropolis	Death Knight	0 (impossible)
Necropolis	Necromancer	0 (impossible)
Dungeon	Overlord	1
Dungeon	Warlock	6
Stronghold	Barbarian	1
Stronghold	Battle Mage	4
Fortress	Beastmaster	6
Fortress	Witch	8
Conflux	Planeswalker	1
Conflux	Elementalist	4
Cove	Captain	2
Cove	Navigator	4
Factory	Mercenary	3
Factory	Artificer	6

User commentary

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First Aid is useful on early stage of the mission in those cities, whose Blacksmith produces First Aid tents (apart from Necropolis). Healing Unicorns or Wyverns will help rushing through the map without slow and weak units in the army. However, in major battles, a tent is not that useful. Therefore, First Aid secondary skill is better on small maps, and, of course, useless if you play for a town unable to produce tents (and there is no opportunity to get one somewhere else). First Aid is one of the less used secondary skills in the game. At Expert level, it only heals up to 100 health points, which means that all creatures up to the fifth level and most of the sixth level creatures can be fully healed. However, considering that the healing is only given to a single monster, the impact of the First Aid Tent is almost always negligible. Though First Aid is not useless, most other skills in the game are generally more useful. The most common situation where First Aid can be worth getting is if the player manages to get one or more level 6 or 7 creatures early on in the game (e.g. Refugee Camp), as these units can receive the full 1–100 health provided by this skill. Furthermore, it should be noted that unlike most other skills in the game, the effect from First Aid can never run out of mana or ammunition. As a result, it can be very effective during long battles in the early game where the player has at least one level 6 or 7 unit, because as long as the First Aid tent survives and the high leveled units do not take more than 100 damage per turn, they are effectively made imperishable by First Aid. However, it can still be more advantageous to choose another secondary skill than First Aid even in these situations, as the First Aid unlike most other skills will become less useful the longer the game goes on, as the 1–100 health provided by it becomes less and less substantial. In patch 1.7.0 of Horn of the Abyss, the First Aid Tent now also has its minimum healing increased, making it more reliable in the aforementioned scenarios.

See also:

• Secondary skills
• War machine