The basic idea is to have a martial knightly-type class that uses both Strength and Intelligence as important ability scores. We have the Warlord as a Leader already, and I think the Cavalier would make a good Defender of this concept.

And, what the hell, I like the concept of an intelligent fighter, so let's add another.

This would be in some ways the Martial version of the paladin, particularly considering I'm envisioning a Defender with Leader-ish capabilities.

Though I'm having trouble coming up with class features that would make it a comparable defender to the fighter without stealing too much from the fighter.

Here's some ideas:

- Marks every attack, as per fighter.
- No free attack against shifting enemies, so as not to step on fighter's toes there.
- Instead make shifting enemies have to use extra movement or standard action or suffer some penalty for shifting, so as to discourage it in a different way than the fighter.
- opportunity attacks don't stop movement, so as not to step on the fighter's toes.
- Intelligence modifier gets added to both the attack roll and damage roll of opportunity attacks. This punishes provoking OAs in a different way than the fighter, and shows off the Cavalier's ability to exploit a weakness (via his intellect).

A Burst 1 around the Cavalier counts as difficult terrain for shifting opponents. (This would let creatures with shifty still shift, but if they have shift 2 powers, they can still only shift 1).

Yeah or even 'any creature that starts adjacent to you treats a burst 10 as diffcult terrain for purposes of shifting'