As design philosophy has changed and they have added more value to cards (including lands), card advantage has become less of a constraint, and being constrained as mana has become the games core constraint
In the end, the pros and cons of these extra, unusable cards are such that either one could be argued as better than the other by anyone who likes them
Its also nice to have a built-in draw engine and threat two in one in a format full of planeswalkers
Despite this it is so cheap for so many cards all to your self it may be employed in agro, control and combo to good effect
The Broodmoth brings Boromir back, but Solemnity stops the flying counter, and lets you activate Boromir again
Legendary Creature - Bat God Creature (CTRL to add secondary) Discard Necrogoyf Necrogoyf's power is equal to the number of creature cards in all graveyards