CardName: Turbid Waters
Cost:
Type: Land
Pow/Tgh: /
Rules Text: {T}: Add {1} to your mana pool.
At the beginning of your end step, if you spent {U} and {B}
to cast spells this turn, you may have target player put the
top three cards of his or her library into his or her
graveyard.
Flavour Text:
Set/Rarity: Link's Unplaced Cards Uncommon
Turbid Waters
U
Land
: Add to your mana pool.
At the beginning of your end step, if you spent and to cast spells this turn, you may have target player put the top three cards of his or her library into his or her graveyard.
: Add 
to your mana pool.
and 
to cast spells this turn, you may have target player put the top three cards of his or her library into his or her graveyard.
Obviously, the power of level of these needs to be balanced.