Weather Siphon

Each spell cast by any player can only gain you
a maximum of 1 life from weather siphon.
Every time any player successfully casts a red
sorcery or red instant, you gain 1 life.
Every time any player successfully casts a blue
sorcery or blue instant, you gain 1 life.
Every time any player successfully casts an
elemental, shaman &/or wizard spell,
you gain 1 life.
"The trick is to not control any of it."