Monkey Diamond

The Monkey Diamond Is A Tower That Gives Different Upgrades Depending On The Tower Its Placed On Its Free. But Does NOTHING When Placed On A Tower, So You Have To Upgrade It, With One Of 8 Upgrades! Its Unlocked At Rank 20, Can Give 2 More Upgrades At Rank 30, Can Give 3 More At Rank 40, And Gives The Rest At Rank 60