Preston, Master Salesman

Make the Sale-Whenever another player castes a spell on your turn, gain mana equal to it’s mana value. Mana gained this way may be of any combination of Green or Red.

Recruit-Whenever a green creature enters under your control, put a +1/+1 counter on it.

Industry Experience-Whenever a non-green creature enters under your control, gain 1 Green
mana.