Pest Breeding Ground

At the start of your upkeep, you may pay 3 life or
sacrifice a food token. If you do, create a 1/1 pest
token. At the start of your upkeep, create X 1/1
pest tokens, where X is half the pest tokens you control rounded down.
{t}: Add {c}{c}. Spend this mana to cast colored
spells.
{t},{p/g}: Add {c}{c}{c}{c}. Spend this mana
to cast colored spells.