Bramble shield; when blocking and an enemy attacks you spikes (like the snarbolax's) will fling in a random direction for each certain amount of damage done (idk how much.) could be a branch from the snarbolax shield line. Ps. bramble shield name is a place holder, name up for debate

Napalm shield; when you shield bash with this shield, you leave a trail of fire (see: fire pots) and inflict fire instead of stun.
point of debate: do you think the shield should have a chance to inflict fire on you when used in this manner?

Ice shield; similar to the napalm shield but you leave behind a large V of ice mist (like what happens when an ice cube dies.)