I'll mention the first cards that come to mind, although if they WERE legal online, they're all powerful enough to have good chances of being on the banlist as well:
Both Delver and Rancor are on record as being mistakes, each making it to production without recommended tweaks. Not to say that they should be banned, just that they're above what would normally be printed efficiency-wise. Ponder and Preordain are incredible consistency pieces which are a major reason blue is as ever-present as it is, and are banned in other formats for that reason. Being enablers (rather than active pieces) makes them feel less oppressive than they are. The other 5 all follow the same pattern - extreme mana efficiency with meaningful impact, though I'm less certain I didn't overlook something that could fit better.
I'm mostly ignoring sideboard cards here, since they're often either overpowered or underpowered based on the matchup. These I think would break into the 'power' group if their bad matchups aren't considered, since they can be such blowouts:
I think efficient removal (Lightning Bolt, Chainer's Edict), efficient beaters (Delver of Secrets, Gurmag Angler) or library manipulation (Ponder, Preordain), despite being ubiquitous or mistakes, should be left out of the list, as they're not truly broken cards per se, but efficient spells like any other format has. A "power" card should be a card so degenerate that it's resolution firmly puts the player that casts it at an absurd amount of advantage (often even game winning). That said, it's pretty difficult to make a power 9 list without banlist cards because I firmly think that Treasure Cruise, Grapeshot and Cranial Plating should be in. Here's what my list would look like, in no particular order:
UGTurboFogGU
BRSacrificial AggroBR
16The Paper Pauper Battle Bag16
EDH
BRRakdos, Lord of PingersBR
GTitania, Protector of ArgothG
UB Ramses OverdarkUB
Sig by Ace5301 of Ace of Spades Studio
- High Tide
- Strip Mine
- Mishra's Factory
- Hymn to Tourach
- Sinkhole
- Goblin Grenade
Another obvious contender currently is Peregrine DrakeAfter those, here are my picks:
- Delver of Secrets
- Rancor
- Ponder
- Preordain
- Gurmag Angler
- Flame Slash
- Chainer's Edict
- Young Wolf
- Galvanic Blast
Both Delver and Rancor are on record as being mistakes, each making it to production without recommended tweaks. Not to say that they should be banned, just that they're above what would normally be printed efficiency-wise. Ponder and Preordain are incredible consistency pieces which are a major reason blue is as ever-present as it is, and are banned in other formats for that reason. Being enablers (rather than active pieces) makes them feel less oppressive than they are. The other 5 all follow the same pattern - extreme mana efficiency with meaningful impact, though I'm less certain I didn't overlook something that could fit better.I'm mostly ignoring sideboard cards here, since they're often either overpowered or underpowered based on the matchup. These I think would break into the 'power' group if their bad matchups aren't considered, since they can be such blowouts:
- Ghostly Flicker
- Gush
- Mulldrifter
- Atog
- Urza's Tower
- Urza's Power Plant
- Urza's Mine
- Tortured Existence
- Priest of Titania
Including the banlist cards, I would make it a bit different:
- Treasure Cruise
- Grapeshot
- Cloudpost
- Cranial Plating
- Mulldrifter
- Ghostly Flicker
- Frantic Search
- Atog
- Gush
Thanks to DNC from Heroes of the Plane Studios for the sig
Check my Pauper Cube!