When this creature enters, double the number of each kind of counter on any number of target permanents.
"Blue, glossy green, and velvet black, They coiled and swam; and every track Was a flash of golden fire." —Samuel Taylor Coleridge "The Rime of the Ancient Mariner"
Equipped creature gets +2/+2 and has protection from white and from blue. Whenever equipped creature deals combat damage to a player, put a +1/+1 counter on a creature you control, then proliferate. Equip {2}
"'The name of it,' said the lady, 'is Excalibur.'" —Sir Thomas Malory, Le Morte d'Arthur