Mana Wana Swirly Whirlygig

Whenever anyone taps a land for mana. Roll a D8
and apply the corrisponding result below instead
of the normal result.
1= All mana gained is {u}
2= All mana gained is {b}
3= All mana gained is {r}
4= All mana gained is {w}
5= All mana gained is {g}
6= All mana gained is {c}
7= You get {e} instead of mana.
8= You get nothing at all.