The resulting spell's color, mana cost, mana value, and so on are determined by only those alternative characteristics
Liliana of the Veil Liliana of the Veil was a former best planeswalker of all time, and proved its worth for over a decade
Besides being a nice discard payoff, its a human for typal purposes
Its a Midrange deck that provides a large number of recourses to mess with your opponents board state and strategies, splashed with Evasive Questing cards like Pongo and Peter Pan, Never Landing
Now, if you want to do something incredibly innovative with your custom card, like introducing a custom frame or weaving together text and image like some Secret Lairs do, Photoshop/Gimp is likely the way to go
If you're struggling to put a full party together, board games for 2 players are perfect too