When replacing a creature you control with the hydra token created by an X spell while Zaxara is on the battlefield, the hydra token receives no buffs in relation to the X spell cost, and remains a 1/1.
When replacing a creature you control with the hydra token created by an X spell while Zaxara is on the battlefield, the hydra token receives no buffs in relation to the X spell cost, and remains a 1/1.