Elixir of Eternal Bloom

{1}, {t}, Discard a land card, Sacrifice Elixir of Eternal Bloom: You gain 1 life for each land you control. Shuffle Elixir of Eternal Bloom and all land cards from your graveyard into their owner's library.
When no plant does not grow, the last hope to farmers is to use this elixir. It's not cheap solution, but assured.