Lake of Pure Mana

At the beginning of your upkeep Place X Mana counters on Lake of Pure Mana. (X equals half the number of Islands you control rounded down. You
cannot have more counters than Islands in play.)
Then add a Mana counter.
{t}, Remove X counters: Add X {u}.
{t}, Remove all counters: For every three counters removed this way create a copy of Lake of Pure
Mana except the copies are not Legendary.
{t}, {u}, Sacrifice Lake of Pure Mana: Return target spell to owner's hand.