CardName: Castle of Currency
Cost:
Type: Land
Pow/Tgh: /
Rules Text: {T}: Add {1} to your mana pool.
{1}{R}{W}, {T}: Add {5} to your mana pool.
Flavour Text:
Set/Rarity: Multiverse Design Challenge Rare
Castle of Currency
R
Land
: Add to your mana pool.
, : Add to your mana pool.
: Add 
to your mana pool.
, 
to your mana pool.
See Challenge # 109 and Castle of Victory. This card represents the money track.
This is something like Temple of the False God. It gives
at 4 lands rather than 5, but requires you to have 
and 
washable away.
This feels like the wrong combination of colors. I could see the effect being
.