The idea is to keep the board clear with cards like Deafening Clarion and Time Wipe, play a bunch of planeswalkers that generate card advantage, eventually stick a Fires of Invention to allow us to cast our spells for free (and spend our mana activating Kenrith, the Returned King or scrying with Omen of the Sea), and overwhelm our opponent with planeswalker value and even planeswalker attacks with the help of Sarkhan the Masterless
I'm sure that the next version will probably have 20-30 cards but that is just a guess." Actually, try well over 100 Innistrad cards
With certain playgroups, I'd slot this in without any other discard support
however, the fact that I found this in the first 6 Lorcana booster packs I ever bought was definitely a welcome surprise
While Tyranid Swarm certainly includes old staples like Sol Ring, Cultivate and Farseek, it also brings with it a package of new ramp pieces for the format