Shelldock Slagheap enters the battlefield tapped unless you pay .
: Add or to your mana pool.
Sacrifice Shelldock Slagheap: Add or to your mana pool.
: Target creature loses all landwalk abilities until end of turn.
.
: Add 
or 
to your mana pool. or to your mana pool.: Target creature loses all landwalk abilities until end of turn.
