thanks for answering me so quickley but i dont think either of those actually work due to the fact that you need and arcane infuser thing to make the silverwood wand core and i could find any sort way to spawn a pech2 solutions. There's a blood magic recipe with the alchemical chemistry set to create, I think, silverwood saplings. That will let you craft a silverwood wand, then you can make your infusion altar to make a greatwood sapling.
2nd, may be easier or harder, depending on your spawn luck. Take all the gold armor pieces (damage isn't an issue), and trade with a pech. You'll need to bribe him first by dropping the gold items near him, then you can right-click to open the trading interface. Gold blocks (or maybe just more gold armor I think) gets you good stuff, like silverwood/greatwood saplings.