Creature Artifact - Elk Color tag templates(None) Land Tax At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle
Nykthos, Shrine to Nyx can generate 5-6 mana in an activation in a dedicated devotion deck, which is then used to pay for X-spells and the like
Timberwatch Elf
The other option is to crack it and resubmit it
This created a small percentage of Base Set Pikachu cards with red cheeks as a print error, before it was corrected - and these are now highly valuable and sought-after
If a Mount becomes some other creature type, it will still have saddle, and non-Mounts can gain saddle if effects allow them to do so