Woomi, Warlock of Many Hats

{t} {2}: Regenerate target creature you control
{t} {2}: Investigate
{t} {x} : You may cast a spell from your hand
with mana value {x} without paying its mana cost.
Woomi, Warlock of Many Hats abilities cost {t} less to activate if you control Mackenzie, Charismatic Ranger