Since Modern clocks in at over 50 playable decks, Im only going to cover the main ones, and hopefully from those you can get a baseline to figure out the rest yourselves
Eternalize only as a sorcery.) Creature - Druid Snake Color tag templates(None) Kodama's Reach Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle
In addition, it is critical in the grind game, since it can summon other "Nimble" from the graveyard
It is used as an essential card because it has powerful effects such as search, additional normal summon, change of format to defense display, and blocking monster effect activation
Mostly however you will blow up a couple of land of theirs, a couple of yours and they won't care at all and will just continue to kill you
It would be better as a B enchantment that just said "0: Discard a card from your hand." Speed is nice but in the cube things are a little more rounded