Arach is underwhelming without ageless mentor so it's OK to plunder away if u dun need early blockers.
Without buff is Bad vs Mandela.
Can summon alot of huge deadly insects with supply lines
Hold Vara gift vs decks with 2/1 like houndmaster, Dara lee l/ mana dorks. Save to break azindel stealth later if u dun need the land immediately
If have both coveted gemstone n expand the reach on turn 3. Usually better to use the relic 1st early unless u missing mana in hand to cast urgent fifth drop. So have better choice to plunder away later.
When Nectar is used on dinosaur. It can echo again. Very good if Dino has been mentored.
If opponent has many deadly insect blockers. May still win using ghostway lands to make big creature unlockable