lava dart for synergy with Balefire Liege (with flashback), having it in my graveyard makes people tend to forget it's even there This way I can surprise them with loads of damage in a pinch. About Sol ring, It is a casual deck, not for use in any tournament or anything, just for fun. I have no idea about the legality of Sol ring in any format...

Why lava dart, but no lava spike? Desperate ritual has synergy with lava spike you know. . And i believe sol ring isn't standard legal. Or at least not two of them in one deck.