Gribbits, Bog Partitioner

Ward - Discard a land.
When Gribbits, Bog Partitioner enters, choose a spell
type. Spells your opponents cast of the chosen type
cost an additional {p/w}or {p/b}
At the beginning of combat on your turn you may sacrifice a land. If you do target creature gains swampwalk until end of turn
When an opponent plays a land card you may put a
land from your graveyard onto the battlefield tapped.
This ability triggers only once each turn