Laexis, Levistus Spawn

When Laexis attacks, you may pay {u}{r}{2}. If you
do Laexis cannot be blocked until end of turn.
When Laexis deals combat damage to a player,
add that add that much mana in any combination
of {u} and/or {r}.
Shadow Casting - {u}{r}: Exile target instant or
sorcery card from a graveyard. Copy it. You may
cast the copy.
Quicken - {u}{r}: Until end of turn sorcery spells
you cast have flash.