Having a bit of blue in the cost will naturally make the card narrower but far less so than with most gold cards simply because of where it is used
You can use the combination in Commander too, and there are ways to find either cards since youre in black, which offers the best tutor suite available
Includes brand-new Commander-exclusive cards
If those options fail, you can always find ways to give it evasion with Whispersilk Cloak, Iroas, God of Victory, Wonder, whatever works in your deck
Rulings-wise, lands are either basic lands or nonbasic lands
Dawn is the only white one and as such it puts the most pressure on your build to actually be a relevant source of value