Lilithander, Impetuous Genius

Whenever another nontoken creature you control
dies, create a 1/1 green Plant creature token.
{t}, Sacrifice another nontoken creature: Add X
mana in any combination of {g} and/or {u} to your
mana pool, where X is that creature's toughness.
—
''Your sacrifice will contribute to a bright and green
future. Isn't that just wonderful? ''