Silklash Spider and Predator are actually at the heart of an infinite combo that's all contained in the prebuilt green C14 commander deck. You can pay 40 mana to make
your own army of elves into flyers, and blow them up, then bring them all back with
Grave Sifter, bring that back with
Haunted Fengraf (preferably with no other creature cards in the graveyard), and bring Haunted Fengraf back with Titania, which you promote to be the commander (it's not infinite if you stick with Freyalise).
Each time through the loop, you get to produce three batches of mana, thanks to Swiftfoot Boots granting haste: one batch from Elvish Archdruid, one from Priest of Titania, and another after you play Wren's Run Packmaster to champion one of them, kill the Packmaster, and bring the mana elf back. With Lys Alana Huntmaster adding more tokens each time you replay your Elves, the amount of mana you generate each time through the loop can increase by 60 or more. Meanwhile, Titania's commander tax only increases by 2, so it's repeatable forever.