Fire Rain

	Fire Rain
	Lvl. 1	Shoots a fire arrow at enemies in the rear, dealing physical damage equal to 10% of attack power for 5 seconds.	Requires:	Acquire rank 3+ archer.
Class:   Archer Type: Physical Attack	Lvl. 2	Shoots a fire arrow at enemies in the rear, dealing physical damage equal to 15% of attack power for 5 seconds.	Requires:	Acquire 7 different archers.
	Lvl. 3	Shoots a fire arrow to the rearmost enemy, dealing physical damage equal to 20% of attack power for 5 seconds, and reduces SP of damaged enemy by 3.	Requires:	Acquire R-9999.
	Lvl. 4	Shoot a fire arrow to the rearmost enemy, dealing physical damage equal to 25% of attack power for 5 seconds, and reduces SP of damaged enemy by 4.	Requires:	Acquire R-1.
	Lvl. 5	Shoot a fire arrow to the rearmost enemy, dealing physical damage equal to 30% of attack power for 5 seconds, and reduces SP of damaged enemy by 5. The critical chance of the next skill increases by 50% for one time.	Requires:	Get "Great!" skill transfer after acquiring Lvl. 4.