Heart of the Mountain
Card name
Arcane Signet
Artifact
SLDSecret Lair Drop#916rare
Borderless
Thráin I came to Erebor and became King under the Mountain. There he found the Arkenstone, Heart of the Mountain.
- Promo
- Promo
- Finishes
- Foil
- Border
- borderless
- Security stamp
- oval
- Frame
- 2015
- Illustrator
- Toni Infante
CommanderLegalModernLegalStandardNot legal
Format legality
Constructed
StandardNot legal
PioneerLegal
ModernLegal
LegacyLegal
VintageLegal
PauperLegal
Commander
CommanderLegal
Pauper CommanderLegal
Duel CommanderLegal
PreDHNot legal
OathbreakerLegal
Tiny LeadersLegal
Arena
AlchemyLegal
HistoricLegal
TimelessLegal
BrawlLegal
Standard BrawlLegal
Competitive BrawlLegal
GladiatorLegal
Other
PremodernNot legal
Old SchoolNot legal
Penny DreadfulNot legal
Future StandardNot legal
: Add one mana of any color in your commander's color identity.Plays as:
Mana FixerMana RockCommander Synergy
Market · per finishtrend updated 6h ago · prices as of Oct 15, 2026
Foil$45.10+9.0%$44.86 low$19.86 gap
Foil$45.10+9.0%30DLowest listing
$44.86Buylist
$25.00Buy / Sell Gap
$19.86+44% · normal spread
Price history
last 30 days · set by the window above · each finish on its own scaleFoil$45.10+9.0%30D
30D range$40.86to$45.55Since Aug 2026:H $101.92L $34.87Loading other printings
Found in
1 productRounded oddsProductPriceFoil
Secret Lair Drop Secret Lair Promo x The Hobbit Arcane Signet
Box Set · $48.25
$48.25Foil 1+ copies
Combos
Rulings
3 · latest Nov 10, 2020
- WotCNov 10, 2020
If you don't have a commander, Arcane Signet's ability produces no mana.
- WotCNov 10, 2020
If you have two commanders, the ability adds one mana of any color in their combined color identities.
- WotCNov 10, 2020
If your commander is a card that has no colors in its color identity, Arcane Signet's ability produces no mana. It doesn't produce
.