Iron Skin (Crusader)

Iron Skin is a Defensive skill.

In-game
While the skill lasts, it halves all damage taken. It has no limit on how much damage it can absorb. Can be used while under Crowd Control effects, and breaks existing effects.

Visually, it encases the Crusader in a suit of armor, but is different from (and can be used during the) Akarat's Champion (graphics of the latter suppress the Iron Skin visual).

Runes

 * Reflective Skin: also quadruples the Crusader's  damage while active.
 * Steel Skin: increases the duration to seconds.
 * Explosive Skin: when Iron Skin expires, it explodes for damage as Physical to enemies within 12 yards.
 * Charged Up: also has a chance per tick (roughly every 0.5 seconds) to Stun all enemies within  yards of the Crusader for  seconds.
 * Flash: if the Crusader takes any damage while Iron Skin is active, their movement speed is increased by and they can move through enemies unhindered. This surge of speed lasts  seconds. This effect is renewed, but it also does not stack.

Non-rune enhancements

 * Hallowed Bulwark (Legendary Crusader Shield): Iron Skin also increases Block Amount by 45–60%.
 * Roland's Legacy Set (Set Bonus for 2 items): every cast of Sweep Attack or Shield Bash reduces remaining cooldown by 1 second.