Currents of Power

Put up to 2 harvest counters on up to 2
monoblue lands. Everytime an opponent taps a
land with one or more harvest counters on it,
they must discard cards with a total converted
mana cost of at least X with X being the number
of harvest counters on the tapped land.
Everytime you tap a land with one or more
harvest counters on it, you may sacrifice it and
put X-1 harvest counter on up to X-4 (minimum
1) target lands, with X being the converted mana
cost of the sacrificed land.