#Testing Natural Order (--> Sacrifice effects as part of the casting cost).
#As an additional cost to cast Natural Order, sacrifice a green creature. -- Search your library for a green creature card and put it onto the battlefield. Then shuffle your library.
[INIT]
FIRSTMAIN
[PLAYER1]
inplay:forest,grizzly bears
hand:natural order
library:force of nature
manapool:{2}{G}{G}
[PLAYER2]
[DO]
natural order
choice 0
grizzly bears
choice 0
force of nature
[ASSERT]
FIRSTMAIN
[PLAYER1]
inplay:forest,force of nature
graveyard:grizzly bears,natural order
manapool:{0}
[PLAYER2]
[END]