Shallan, Illusionary Artist

{b}{x}{x}, Shallan becomes "Veil" a 1/4 for X turns (opponents turns count) where X
is the amount of stormlight used to activate this ability and gains "This creature cannot be blocked" and "When this creature deals combat damage to a player investigate"
{w}{x}{x}, Shallan becomes "Radiant" a 4/4 for X turns (opponents turns count) where X is the amount of stormlight used to activate this ability and gains first strike and deathtouch
{w/b}{w/b}{x}{t}, Create a copy of target creature or planeswalker o