Paying life is around in the format but it isnt some huge theme, and you need to both pay life and have a card where it matters that you can reduce its cost It can ramp your mana quite effectively, and that makes it more likely that you can get a creature with power 4 or great into play quickly, at which point Ruby herself becomes a significantly better attacker
But I dont think its potential has been unlocked yet
Through the Ages cards can be found non-foil in both Play Boosters and Collector Boosters, with foil versions of the cards only available in Collector Boosters
From there, you can attack right away, get some energy for your troubles, and pay eight energy to kill some major threats or even send a bunch of damage at an opponents face
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The archetype this monster spawned gives it many paths to go vis--vis special summoning, allowing more powerful variations to come onto the field with special effects