Multicolour and Artifact Dungeon Cards Venturing into the Dungeon Cards Triumphant Adventurer is a great attacker thats hard to kill unless you double block it, and when your opponent does they'll lose the best creature of the two
All of those are solid additions
There are plenty of cards like Rhythm of the Wild and Fires of Yavimaya that can give haste to all of your creatures if you go down that route, so all you need is some sweet creatures to combo with it and Im sure that you can find some
P/T Number 302 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (8/7/2020) If you don't cast the nonland card with mana value 3 or less, it'll be put on the bottom of your library in a random order with the other cards
If you want something a bit smaller in scale, cards like Sparkmage Apprentice, Ghitu Shaman, and Basalt Ravager can really bring the beats
But Aurora does sport a unique ability