(Overgrown Stronghold isn't a spell.)
Whenever Overgrown Stronghold becomes tapped, it deals 1 damage to you.
, : Tap target artifact with converted mana cost X or less.
, : Add to your mana pool.
, 
: Tap target artifact with converted mana cost X or less.
, : Add 
to your mana pool., : Add to your mana pool.
