Palazzo d'Opale (Opal Palace) (it)
Land
: Add .
, : Add one mana of any color in your commander's color identity. If you spend this mana to cast your commander, it enters the battlefield with a number of additional +1/+1 counters on it equal to the number of times it's been cast from the command zone this game.
- [CMM] Commander Masters #422 (C)