Why are these card banned in Legacy?

[Carnac]

Okay, Ive been away from magic from Urza-block - M2010 Block.
I know why cards like Memory Jar, Tinker, Hermit Druid, Oath of Druids etc are banned, since they are from Urza or earlier.

But can anyone tell me why these cards are banned:

Flash, Gush, Mind's Desire, Worldgorger Dragon, Goblin Recruiter

What makes them so powerful they need a ban?

[honestabe]

Okay, Ive been away from magic from Urza-block - M2010 Block.
I know why cards like Memory Jar, Tinker, Hermit Druid, Oath of Druids etc are banned, since they are from Urza or earlier.

But can anyone tell me why these cards are banned:

Flash, Gush, Mind's Desire, Worldgorger Dragon, Goblin Recruiter

What makes them so powerful they need a ban?

Read them.  They're all retarded.  Resolution of any of them in the proper deck is almost always victory.  Except worldgorger, which combos with animate dead

[Evenpence]

Okay, Ive been away from magic from Urza-block - M2010 Block.
I know why cards like Memory Jar, Tinker, Hermit Druid, Oath of Druids etc are banned, since they are from Urza or earlier.

But can anyone tell me why these cards are banned:

Flash, Gush, Mind's Desire, Worldgorger Dragon, Goblin Recruiter

What makes them so powerful they need a ban?

Flash combos with Protean Hulk if it's in your hand to give you an instant-win.  It's a two card combo that is too easy to pull off (it costs 1U).  Don't ask me how the flash combo works, it requires like six cards total (maybe it's less than that, someone might be able to chime in here), but Protean Hulk finds them all.

Gush combos really well with Merchant Scroll to draw you a billion cards per turn ---> combo kill or super pump on a Quirion Dryad or Psychatog, etc etc etc.

Mind's Desire is absolutely ridiculous -- let's say you storm for 5.  You flip over five cards and one of them is Mind's Desire.  You cast two or three more for free, then Mind's Desire for another seven or eight.  You hit another Mind's Desire off the eight you flip over and Mind's Desire for twelve.  You end up flipping over every card in your deck, including counterspells and your stormy win condition.

Worldgorger Dragon (as mentioned above) creates an infinite mana loop with reanimation spells, and again, only costs ~1B or ~2B to do (you also have to have a dragon in your graveyard, but doing that is pretty easy).

Goblin Recruiter was banned to limit the power of goblins, it was the strongest deck in legacy for months and months and months.  Maybe years.

[Nefarias]

The simplest Flash/Protean Hulk kill involves the Hulk getting 4 Virulent Sliver and a Heart Sliver. There are other, arguably better kills but they all requires complicated explanations.

Recruiter was used to stack your deck in such a way that every fourth card (including the first) was a Goblin Ringleader. With Food Chain out, this would draw you 16 cards and put out about a dozen Goblins, which would have haste thanks to Goblin Warchief (or just kill you there with Siege-Gang). It was also used to stack your deck for Goblin Charbelcher.

Mind's Desire is still a broken spell as a one-of in Vintage, but its power expands exponentially with the possibility of "chaining" them off as described above.

I'm not familiar enough with Legacy to know for sure, but I'm not convinced that Gush deserves its spot on the list, considering Fastbond is banned in the format.

Worldgorger has been banned since the splitting of the lists, back when it was a viable Type 1 deck. To my knowledge, they have not yet UNbanned anything since the split. So Worldgorger hasn't proven itself to be too broken for Legacy, but based on its power at the time in Vintage they didn't want any cheap combos running around.