Blue gives us a lot of instant-speed spells in this category, also which means that careful readers of Vial Smasher who noted that it says first spell each turn can jam some powerful, expensive instants whenever they want and blast people
Maybe a bit mana-intensive, but the rewards are all there, and the final level is great upside on whats essentially a 2-mana 2/2
Defiant Strike and Sheltering Light not only pump your attackers but also let you search through your deck or draw cards to make sure future draws keep you from flooding out
And finally, we have the unpassable U.A
Given how often cards are drawn outside of players own turns in Commander, this can quickly snowball into a mountain of Treasures
Emerias Call / Emeria, Shattered Skyclave Emeria's Call is a pretty slow win condition but has incredible flexibility thanks to Emeria, Shattered Skyclave on the backside