its a great piece Tessi.. the blood rendering is superb and you've captured the lion's movement very well. focus is clearly directed towards it by the environment, the gladiator's spear and the dynamic angle. very nice touches.
but i feel there could have been more detail on the guy's armor.. as well as the sand. it's too bare and rather bright, a bit distracting. the shield and armor could use a bit more 'life'.
over all its a great piece.. nice work and welcome to CA - JAG
it's only after you've lost everything, that you're free to do anything..