Lara of the Depths

You may choose the opponent's deck, flip a coin, if heads you may also choose to force mulligan first turn.
{u}{b}{u} Roll a d20, if you get a 15 you can summon anarchy bubble for no mana cost
{b}{5} Pay 7 life, target player plays with their hand revealed as long as Lara is on the field
"It is not victory we seek, but chaos. Now, reveal your hand"