(Worth noting is that when Infested Thrinax enters the battlefield for the second, third, and so on time each turn, whether through this loop or some other means, each instance of Saproling creation will stack, so you start generating Saps faster with each loop.) Infinite mana, tokens, enters/leaves the battlefield (or leaves the graveyard, hello Insidious Roots!) effects for you to use how youd like
Its simple, but its powerful
Ninjas Blades gives you what is essentially a free Yuriko trigger
However, it seems it has found a footing in the Surging Sparks format, as it can set up really quick with cards like Crispin, Dark Patch, and Neo Upper Energy, which lets it meet the energy requirement for Obsidian ridiculously quick
For starters, the ability to get a second use out of your most effective spells is great, but it also removes the extra cost you normally have to pay with flashback cards
The prices on other EA rares/mythics from previous sets backs that up