Tergrid states that whenever an opponent sacrifices a non-token permanent or discards a card, you can put that card onto the battlefield under your control
As a Gold Prizm parallel, it is extremely rare, with only ten copies ever produced
When the payoffs are there, you can stretch your manabase, and this is one of the best Magic: The Gathering cards you could hope to resolve
These collector boosters have been incredibly hard to come by, hence the high pricing
Either way, using this part has the amusing effect of giving her a 10-point attack
But the family evidently considers Jolina central to the collection's identity, so she's become its namesake