Bootie, Retired Creator

Protection from creatures
Whenever you cast an artifact, you may sacrifice another artifact. If you do, put a Building counter
on Bootsie, Retired Creator. If Bootsie has 10 or
more Building counters on it, create a Legendary Indestructible artifact land named Retirement
Oasis. It has " {t}: Add {c}{c}{c}. Whenever you tap
this land for mana, and use all mana added,
opponents can't cast spells this turn."