#Bug:basal sliver's ability doesn't give mana
[INIT]
FIRSTMAIN
[PLAYER1]
inplay:basal sliver,metallic sliver
[PLAYER2]
[DO]
metallic sliver
[ASSERT]
FIRSTMAIN
[PLAYER1]
inplay:basal sliver
graveyard:metallic sliver
manapool:{B}{B}
[PLAYER2]
[END]