Kian, Diverger of Neurons

Dash {w/u}{w/u}{w/u}
At the beginning of your pre-combat main phase, discard any amount of cards. If you do you may
cast a card with mana value equal
to or less than the amount of cards you discarded without paying its mana costs.
When Kian, Diverger of Neurons deals combat
damage to a player, you may discard any amount
of cards. If you do draw that many cards plus an additional card.