Rockabye Becorns

As an additional cost to cast Rockabye Becorns, discard a
card. When you do, place two acorn counters among
permanents you control.
Dream X, then create X 1/1 green Becorn soldier tokens,
where X is equal to the number of acorn counters
among permanents you control.
(To dream, reveal X cards from the top of your library.
For each card you may put it back on top in any order
or exile it and gain 1 life)
Loo's lullabies often attracted visitors.