Shroud (This creature can't be the target of spells or abilities.) Isleback Spawn gets +4/+8 as long as a library has twenty or fewer cards in it.
The more deadly the lake monster, the shorter the tale.
Official Rulings for Isleback Spawn
5/1/2008 : It doesn't matter which library has twenty or fewer cards in it, and you don't have to specify a library. If multiple libraries have twenty or fewer cards in them, Isleback Spawn will still get its bonus only once.
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