Druidic Ritual and Sudden Reclamation for a creature and a land, Eccentric Farmer/Pothole Mole as creatures with the same effect, Roots of Wisdom for elf typal decks, Crop Sigil as a self-mill engine, and Say Its Name if you want to cheat Altanak, the Thrice-Called from your library
And third, this is really what synergizes most readily with your commander
In many ways, Black Bolt and White Flare are spiritual sequels to the immensely popular 151 set released a few years ago
Of course, you can still opt for the old Frigibax if youre willing to do some early damage or are using Greninja
Once it rotates from Standard, it will never see play again, unless there is a need to have a fifth or sixth Oblivion Ring in a deck (that's an interesting deck to think about)
It doesn't have to be the same player or planeswalker that Carefree Swinemaster is attacking