Magic: the Gathering in the UK
Don't you mean "Enters the Battlefield tapped"? :os
I've a feeling they might be chrome-mox-esque...
Slimy dung heap
T: Add B or G to your manapool.
When Slimy dung heap enters the battlefield, you may discard a card from your hand. If you don't, Slimy dung heap comes into play tapped.
I think they're of the form:
"comes into play tapped unless you control a plains or a forest. TAP: add W or G to your mana pool"
Can't remember if they have the basic types themselves.