R
Instant
When you cast this spell, if an opponent controls any creatures with Mountainwalk, all permanents lose protection from red and cannot gain protection from red this turn.
Hoser Hoser deals damage to target creature equal to the number of Mountains you control.
The Knights of Thorn were ... well ... painful to the goblins.
It should be clockwise or anticlockwise, IMO, as that remains consistent regardless of whether it was rotated 180 degrees (from being on the other side of the board) beforehand.
Brillo Pad may as well have "Cumulative Upkeep - Brillo Pad deals 1 damage to you.".
Impudent causes a lot of weirdness. Since creature spells are still spells, it will end up forming counterless creatures with P/Ts that don't match their printed values. On the plus side, though, at least it's practically impossible to play a second.
Even then, the way it's worded would put the token into play before exiling anything, causing you to run into the same problem (I think).
How about a slight change to:
"Create a token that's a copy of target creature or planeswalker. It gains haste and "At the beginning of the end step, exile this permanent". If a permanent with the same name would be put into a graveyard from the battlefield this turn, exile it instead."
It's funny you bring up Grandeur, since both it and the legendary instant/sorcery mechanic (or just legendary sorcery for now, since I don't recall seeing legendary instants among the Dominaria leaks yet) appear in Dominaria return sets.
Huh, and here I thought this was your own atrocious design.
As far as I can tell, then, the only issue is with the exiling of like-named legendary permanents. Surely the legend rule kills both creatures before EoT, so nothing can actually be exiled?
Pillar of the Paruns but it now makes colourless. Sure, the first activation is a decent bit worse but after that it can even pay for mono stuff.
Chroma Land is many times stronger than Pillar. Pillar is only a land if you are casting multicolor, while chroma is always a land with a significant boost after you play multicolor. Its like comparing Ancient Tomb and Temple of the False God.
That's kinda what I was getting at. It loses 90% of the drawback of the Pillar and its only new flaw is not helping with your first gold card.
A slightly modified version would be:
At the beginning of the end step, if you control no multicolored permanents, sacrifice Chroma Land. T: Add one mana of any color to your mana pool.
More than "slightly", I feel, but that's what was needed. Perhaps "your end step." so you have a chance to save it if your opponent starts blowing stuff up, though?
Power Key, this is strong, almost certainly too strong, but meh. It should read "Spend this mana only on costs that contain x."
There is a subtle difference between paying the X and paying any colourless cost on a card with an X. Your version is, however, slightly stronger than the original.
Unless you choose him and give haste to every weenie you played that turn as well.
It makes for a more interesting decision process if he's got the potential to be worth copying even when he's not the biggest dragon on board.
Unlike, say Fan Favourite and Play of the Game.
R
Instant
When you cast this spell, if an opponent controls any creatures with Mountainwalk, all permanents lose protection from red and cannot gain protection from red this turn.
Hoser Hoser deals damage to target creature equal to the number of Mountains you control.
The Knights of Thorn were ... well ... painful to the goblins.
Mana Mantle should probably read "Whenever a spell resolves..." but, as user says, it's not a trigger that's used.
Impudent causes a lot of weirdness. Since creature spells are still spells, it will end up forming counterless creatures with P/Ts that don't match their printed values. On the plus side, though, at least it's practically impossible to play a second.
How about a slight change to:
"Create a token that's a copy of target creature or planeswalker. It gains haste and "At the beginning of the end step, exile this permanent". If a permanent with the same name would be put into a graveyard from the battlefield this turn, exile it instead."
Huh, and here I thought this was your own atrocious design.
As far as I can tell, then, the only issue is with the exiling of like-named legendary permanents. Surely the legend rule kills both creatures before EoT, so nothing can actually be exiled?
That's kinda what I was getting at. It loses 90% of the drawback of the Pillar and its only new flaw is not helping with your first gold card.
More than "slightly", I feel, but that's what was needed. Perhaps "your end step." so you have a chance to save it if your opponent starts blowing stuff up, though?
There is a subtle difference between paying the X and paying any colourless cost on a card with an X. Your version is, however, slightly stronger than the original.
Pillar of the Paruns but it now makes colourless. Sure, the first activation is a decent bit worse but after that it can even pay for mono stuff.
It makes for a more interesting decision process if he's got the potential to be worth copying even when he's not the biggest dragon on board.