metal counter terminal

at the beginning of your turn you may put X
metal counters on metal counter terminal
where X the amount of metal counters you
control. {2}{t}you can put these metal counters
on lands and enchantments or artifact you
control if a land has three metal counters on it
that land will produce an additional manner of
that color if enchantment or artifact has three or
more counters on it at the beginning of each
upkeep you gain three life