Nimbus Maze
Land
: Add 
.
: Add 
. Activate only if you control an Island.
: Add 
. Activate only if you control a Plains.
To find its center is to find one's own.
Jason Chan
Iconic Masters (IMA)
• #242Rulings
Nimbus Maze's last two abilities check the subtypes of lands you control, not their names. You can activate the appropriate abilities as long as you control a land with the corresponding subtype, Plains or Island. Most nonbasic lands don't have basic land types, even if they produce colored mana. For example, Nimbus Maze itself is neither a Plains nor an Island, while Hallowed Fountain is both.
(wotc • 2017-11-17)
Rulings
Nimbus Maze's last two abilities check the subtypes of lands you control, not their names. You can activate the appropriate abilities as long as you control a land with the corresponding subtype, Plains or Island. Most nonbasic lands don't have basic land types, even if they produce colored mana. For example, Nimbus Maze itself is neither a Plains nor an Island, while Hallowed Fountain is both.
(wotc • 2017-11-17)