Hyper Extended is a constructed format which includes the following sets
Fallen Empires -> Scourge. Including the Black Bordered Portal sets One and Second Age.
No white bordered cards are allowed. No new frame or time shifted trash is allowed. You must use the card from the set and can't use reprints even going backwards. For example Ice Age contains Swords to Plowshares, you can't use a Revised one, or a crappy 4th one. You can't even use a gorgeous Beta one. Wrath of God is found only in Portal, you must use that one. If a card is in multiple legal sets you may use any, or mix and match to trigger your opponents.
Ferrin cards are encouraged to further confuse opponents.
All ante cards are banned.
Hyper Extended features a restricted list:
Ancient Tomb Burning Wish Demonic Consultation Dream Halls Earthcraft Enlightened Tutor Frantic Search Goblin Recruiter Grim Monolith Gush Hermit Druid Memory Jar Mind’s Desire Mystical Tutor Necropotence Personal Tutor Tinker Tolarian Academy Vampiric Tutor Windfall Yawgmoth's Bargain Yawgmoth's Will
With a restricted list in place, it can be argued that Tinker has few targets that can be considered “broken.” A powerful card for sure but possibly a candidate for unrestriction.
Flash is the basis of a degenerate, and frankly, boring turn one combo that I completely forgot about. I don’t think anyone will have a good time with four copies of this spell hanging around, but we can try it as a playset first.
Lion’s Eye Diamond has a converted mana cost of 0 and makes three mana of any one color. It's pretty fucked with Yawgmoth's Will.
Oath of Druids is miserable but given the power level of the fatties might not be that broken.