Slyvanus

{t}: Put a Tree artifact onto the battlefield under your control. It has "Sacrifice this artifact. Choose 1: Add 1 mana of any color to your mana pool or Tap target creature".
Only a maximum of 3 Tree artifacts under your control is allowed.
Sacrifice 3 Tree artifacts: Add X mana of any combination of colors to your mana pool, where X is your devotion to green. Activate only when Slyvanus is still on the battlefield under your control.