(Bog Knoll isn't a spell.)
Whenever Bog Knoll becomes tapped, it deals 1 damage to you.
Whenever a card is put into a graveyard from anywhere, exile that card.
: Add or to your mana pool.
Put Bog Knoll on top of your library: Add to your mana pool.
: Add 
or 
to your mana pool.
to your mana pool. 
