Enchantment - Saga Sheoldred, Whispering One Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield
There are a few staples that any Elf deck will love like: Elvish Archdruid Elvish Warmaster Overwhelming Stampede There are several high-power spells in the deck too, like Heroic Intervention and Asceticism to keep your creatures safe, and Genesis Wave to turn your mana into even more creatures
May be a great opportunity for you to draw an clutch of cards, or smoke an opponent with a board full of tokens
If you want kitchen table MTG, just go with whichever Jumpstart you can get the cheapest
It's annoying and pervasive, but I don't think it rises to the power of the Top Ten, because, well, Slivers are fun, right
You can even cast it for less, via Madness