What feats expand a character's critical range?

Question

What dnd 4e feats exist that expand a character's critical range? For example, my cleric took the paragon path Radiant Servant and was granted the feat Illuminating Attacks, which makes his radiant attack a critical on 19 or 20. I would like to know this to keep in mind for other characters that I may make in the future.

Answer 1

From a search on the compendium for "critical 19-20" under feats

• Power of Luck: 19-20 for Bond of Censure, Holy Strike, Lance of Faith, Vanguard's Lightning
• Ogremight Bruiser: Fighter, Ogremight Student, 19-20 on charging and 2h hammer (what's that, Mordenkrad and Avalanche hammer?)
• Ogremight Ravager: Warlord, Ogremight Student, as above.
• Steel vanguard captain: Warlord, 19-20 on certain encounter powers with 2h heavy blade
• Steel Vanguard Soldier, Fighter, as above
• Steel Vanguard Student, 19-20, 2h weapon, cleave and viper's strike
• Defiling Adept, 19-20 on daily arcane with defiling
• Phantasmal Destruction, 19-20 on wizard illusion powers with combat advantage. Note "Illusion Master" from mage, Illusion Master: When you hit or miss a target using an arcane illusion power, the target grants combat advantage for the next attack made against it before the end of your next turn.
• Violent Joy: 19-20 on... ardent edge case. When you target a bloodied ally with your ardent surge and that ally regains enough hit points to no longer be bloodied, he or she can score critical hits with melee attacks on a roll of 19–20 until the end of your next turn.
• Advantageous Perspective: Small creature, When you make a melee weapon attack, you score a critical hit on a natural roll of 19 or 20 against Large or larger creatures granting combat advantage to you.
• Plunging Blade: Fighter, OA with light blade.

Epic Feats:

They fall into two categories: class based implement and stat based melee weapon. Most older classes have them. Some builds get royally screwed.

Implement Mastery:

• Bard
• Sorcerer
• Warlock
• Wizard
• Avenger(special)
• Swordmage
• Psion

Answer 2

To start there are the following feats:

• Weapon Mastery Feats give expanded crit range (19-20) to weapons by category (heavy blades, light blades etc). These have a stat prerequisite and are available in epic.

There are also some paragon paths that give expanded crit range for instance:

• Dagger Master (Rogue) expands crit range to 18-20 on dagger attacks.
• Radiant Servant (Cleric) expands crit range to 19-20 on radiant attacks.