If you do, those spells gain wither
If the two biggest threats at the table are attacking each other to keep their greatest rival in check, you can probably hold off (this is also a great stage where politicking can help)
Keep your energy going by including typical white draw engines, like Tocasias Welcome, Mentor of the Meek, and Caretakers Talent, and aim to build a big board before your opponents can respond
Through the Breach One of the classic spells to cheat big creatures into play, mainly Emrakul, the Aeons Torn, Through the Breach is here in INR thanks to the associated art
All of these will have their own purpose, and some can be stronger than others depending on what youre looking for, so dont take the self-mill term too literally
To win the game, be the first player to gain 20 lore