[CHAMPION CONCEPT] Teplo, the Fire Starter

So, I wanted a support with powerful crowd control but with the ability to make big plays. I designed Teplo (which means heat in Czech). This is my first time in the forums, so help me out?

PASSIVE : Hot to the touch

Every other basic attack or every 3rd spell reduces the targets magic resist by 10% for 1 second.

[Q] Flame Rise

Teplo commands fire to raise from the ground in a target area, knocking up enemies, and then silencing them. (Scales with AP)

[W] Promethes

ON FIRST CAST: Switches between 3 types of fire: green, blue, or yellow. ON SECOND CAST: Chooses the type of fire. ON THIRD CAST: Gives the fire to a target ally.

Green Fire: Heals target (scales with AP) Blue Fire: Gives ally bonus armor (scales with targets armor) Yellow Fire: Gives ally bonus attack (scales with targets attack)

[E] Cone of Flame

Fires a cone in front of Teplo which increases all allies hit with the cones movement speed by 40% for 2 seconds, or slows enemies by 40% for 2 seconds.

[R] Spirit Fire

Teplo gets a charge of spirit fire every 25 seconds (decreases by 2 seconds every time it is ranked up). Active it to use the fire. Teplo can use up to 3 charges at once (and can only stack up to 3 charges). The charges seek the closest champions, which do damage and stun