Lifeblood Bloom

Whenever a creature enters the battlefield under
your control, put a rose counter on Lifeblood
Bloom, then you gain X life, where X is the
number of rose counters on Lifeblood Bloom.
{1}{g}: Create a 0/4 green Plant Wall creature
token with defender. Activate only if you don't
control any Plants.
"Curiously, the roses found in this region lack thorns."