One one hand, it's only played in one somewhat untested Modern deck
Chandra, Spark Hunter depicts the planeswalker, Chandra Nalaar, on a quest to win the Ghirapur Grand Prix and claim the Aetherspark, the fantastic prize of the race
Example 1: This line has R = 5 + 2 - 5 - 0 - 2*1 = 0
Its always been a deck that Ive struggled to categorize in terms of power level because it can get out to explosive starts with cards like Urzas Saga, Akiri, Line-Slinger, and Cranial Plating, but it also loses HORRIBLY to Vandalblast and Farewell
Squandered Resources, on the other hand, is just a sacrifice engine, though it can work well with these cards
I tried Pokmon TCG Online at the tail end of its lifespan and it didn't endear me, held back by abysmal starting decks and a poor progression system that left me feeling like I couldn't try out the core experience without investing some hard cash