Cactarantula

Reach on a Plant Spider is a flavor gag with real teeth, but the card-draw clause is where the design intent lives: this is a 6/5 built to tax an opponent for pointing anything at it. A removal spell, a tap effect, a bounce spell, any pointed answer that names it as a target refunds a card, so the six-mana investment is insulated against the cheap interaction that usually turns a fat green creature into a losing trade. Note the trigger keys on targeting, not on damage or destruction, and it functions only once the creature has resolved onto the battlefield, so an opponent who wants it dead without handing you a card has to route around the targeting clause entirely: sweepers, edicts, and blockers all kill it without a target, while anything single-target (removal, fights, a Pacifism) pays the toll. Limiting the trigger to opponents' spells and abilities is the fence that stops you from farming your own protection spells for cards, so the ability reads as friction against interaction rather than a self-fueling engine. The Desert cost reduction is the other lever, rewarding a manabase built on utility lands and letting the body land a turn early. It answers an old green complaint: expensive threats die to a one-mana answer and the game moves on. This one makes that exchange costly, converting the opponent's removal into your card advantage or daring them to leave a reacher standing.