For one mana, The Ozolith allows you to move counters from a creature onto The Ozolith, then onto another creature when youre at the beginning of combat
The snow-covered basics are an extreme example, but in general, Secret Lairs haven't offered a meaningful discount over buying the cheapest possible version of a cardthe upside is you get the unique new art
If you have a way to also discount your red spells, Birgi helps you even generate excess mana to potentially cast your whole deck
I found room for other good color-fixing too: Springleaf Drum, Fellwar Stone, Darksteel Ingot, and Chromatic Lantern
A small gap between the tray and the machine is completely normal and ensures smoother operation.
Fling makes it all the sweeter