Ghasurra, the Nightmare Vine

Ghasurra, the Nightmare Vine enters the battlefield
with X +1/+1 counters.
Whenever a land enters the battlefield under your
control you may put X counters on it, where X is
the number of counters on Ghasurra, the
Nightmare Vine. If you do, it becomes a 0/0 Dryad
Horror with "landfall - This creature
deals 1 damage to target creature or player."