Despite dwindling numbers, the Tok'ra have fought the Goa'uld for centuries. In the process, they've no doubt learned many ways to conserve their limited resources and spend them wisely. Today's System Lords preview card shows one of the more prominent ways that has been captured in Stargate TCG:

Ren'al is one of several cards that let the Tok'ra reclaim cards from their discard pile. She's handy not just for reusing a powerful event or "resurrecting" a destroyed support character, she good in a deck with a lot of adversaries (to get back a good card you discarded when paying a revive cost).
If you're making a heavy assault on your opponent's adversaries using cards like Keep in Check and Symbiote Poison, then Ren'al may actually be the "star character" of your deck, taking most of the glyphs earned by your team. On the other hand, she's an excellent supplement to characters like Jacob Carter or Kelmaa -- once you've given them the specific glyphs they ask for, extra copies of those same glyphs can go to Ren'al instead.