Precarious Stairius

When Stairius enters the battlefield, your
opponent faces a Precarious choice.
They must either sacrifice 3 {b} of their mana,
choose to give you an additional 5 life points,
or miss 2 turns.
Oh and you get to tickle them until the end of
the game.
—
Strides ardently onto the battlefield.
Wobbles slightly on wooden stairs.