These are auto-include uncommon cards when you want to start upgrading the deck, and I think they should have just been included here
For instance: Creatures (25) 2 Llanowar Elves 2 Priest of Titania 2 Wirewood Symbiote 1 Quirion Ranger 1 Fyndhorn Elves 1 Viridian Shaman 3 Birchlore Rangers 1 Mirror Entity 4 Heritage Druid 4 Nettle Sentinel 1 Regal Force 3 Elvish Visionary Lands (16) Spells (11) In case you were wondering, yes, Ancestral Recall, Time Walk, and Timetwister had a very powerful dimension to Elves, and a playset of Skullclamps is no joke, either
But even if you dont hit all four, drawing a card whenever you do activate all four in a turn is usually strong enough payoff on its own
Id seen before, but it was pretty limited in allowing non-standard layouts
Song cards are cards that can be played for free if sung by an active character of a specified cost
But does it always have to be that way