If it had either one of its two abilities, it would still be a powerful force, but when you consider both on the same two-drop, youre talking about consistently adding +5/+5 to +7/+7 to the table for just two mana
You may want to start by spreading out poison counters and making sure theres at least one on each opponent to maximize your proliferation effects
The restriction to only nonbasics does limit the card somewhat, but you should be playing the Harvest in any deck where your Commander already cares about basic lands
You can make mentor a lot more playable if you build with him in mind but that is too much effort for a replaceable support card
LIGHT PLAYED (LP) Several small scratches and discoloration Has been used without protection Articuno in LP you can clearly see paint peeling, a "crease" and many micro scratches
There is a clear order to the construction of this deck, and while thats occasionally hindered by card draw, you can immediately see the logic in your hand, and understand which cards should be played first, to take advantage of any possible counter placement and proliferate mechanics