Combat Challenge: Every time I attack an enemy, whether it hits or misses, I can choose to mark the target until the end of my next turn.
Combat Superiority: Wis mod (+3) to OAs. Enemies I hit with an OA stop moving if a move provoked this
Arena Training: I treat all weapons I am not proficient in as improvised weapons. +2 proficiency bonus with all improvised weapons. 1d8 damage for one-handed improvised weapons, and 1d10 damage for two-handed improvised weapons. +1 per tier bonus to AC when not in heavy armor.
I choose two weapons (Spiked Chain, Quarterstaff) as my arena weapons, and gain proficiency in them if not already. Feats that grant attack or damage bonuses to one of my arena weapons apply to all of them.
Stonehide Action: +2 to AC until the end of my next turn when I spend an AP.
Unusual Reach: +1 reach
Powerful Athlete: When I make an athletics check to jump or climb, I roll twice and use either result.
Elemental Initiate Starting Feature: +2 proficiency bonus with unarmed attacks, and deal 1d6 damage with them. Gain proficiency in ki focuses.
Staff Expertise: Don't provoke OAs when making a ranged or area attack with staffs (or, by extension, other arena weapons) as implements. +1 reach with melee attacks made with staffs (and, by extension, other arena weapons).
Spiked Chain Training: Gain proficiency with Spiked Chain, and can treat it as a double weapon with 2d4 damage for each end, stout on the primary end, and off-hand on the secondary end. Both ends count as light blades (in addition to flails).
Midnight Blade Student: When using a light blade, Dual Strike can target Reflex instead of AC
Mark of Warding: When a power grants a bonus to defense, increase that bonus by 1. Mark penalty is increased to -3, rather than -2. Can master/perform certain rituals.
Dragging Flail: When I use a flail to knock an enemy prone, I can also slide that enemy 1 square.
Flail Expertise: When I hit with a melee attack with a flail (or, by extension, other arena weapons), and the attack lets me slide a target, I can knock the target prone instead of sliding it.
Catpaw Style: When I hit with Footwork Lure I can choose to forgo shifting, and instead slide the target 1 square to any space adjacent to me.
Staggering Spiked Chain +3: +3 to distance I can slide a target with powers that can slide. On crit: +3d6 damage and knock the target prone.
Rushing Cleats (heroic tier): +2 to bull rush attacks, increase distance I push or slide with melee or close attacks by 1.
Cloak of Distortion +2: +2 to defenses against ranged attacks from more than 5 squares away.
Iron Armbands of Power (heroic tier): +2 to melee damage rolls
Defensive Spiked Gauntlet +1: +1 item bonus to defenses when I use Total Defense or Second Wind