mtg cards like simian spirit guide & Ancient Stirrings .:. MastersOfModern Spoiler - The Rumor Mill - Magic Fundamentals - Salvation Forums Ape Spirit Elvish Spirit Guide | Alliances

Though tappers are just useful cards to have around, the support of stun counters and consistency of it's effects make it a legitimate archetype to build decks around

Others buy boxes to play limited with their friends

Though it has seen a number of reprintings, many of them are hard to find (such as the From the Vault: Realms version or its reprint in Universes Beyond: The Lord of the Rings as Balin's Tomb)

You won't be disappointed

One of its major weaknesses is that spells may only be countered once, and that once is when they're cast, so you've got to have the mana, or you may just end up getting beaten by the one card that you didn't counter if you can't dig for your Sphinx fast enough, (though the Into the Roils do provide a countermeasure to this)