Here's why:
* "Or" is not a card effect or a card itself in Yu-Gi-Oh. It's a simple conjunction.
* "On" can be used as a word in card effects, but it doesn't have any specific meaning to make a card be tributed.
To tribute "Wickedwitch" you would need to use a card effect that specifically allows for it, such as:
* "Tribute Summon" (a basic mechanic where you send a monster from your hand or field to the Graveyard to summon another monster).
* "Tribute" effects on certain cards (some cards have effects that require you to tribute monsters as a cost to activate them).
It's important to remember that you can only tribute monsters you control. You cannot tribute your opponent's monsters.
Let me know if you have any other Yu-Gi-Oh questions!