(: Add or to your mana pool.)
At the beginning of your end step, if you didn't cast any spells this turn, Isle Burrows deals 1 damage to you.
: Isle Burrows becomes a 2/1 blue and red Fish creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Isle Burrows becomes a 2/1 blue and red Fish creature until end of turn. It's still a land.
