Firellan, Izzet Abjurer

When you or a permanent become the target of a
spell or ability you may may {u/r}{u/r}: Create a
colorless 0/X Barrier Token with:
•X loyalty
•"Barrier is all permanent types."
•"As Barrier enters the battlefield change target of target spell to Barrier."
where X is the Mana value of the spell.
"The battle between safety and progress is an
endless arms race."