You can send your own cards to the graveyard in a few ways:
* Card Effects: Many cards have effects that specifically let you send your own cards to the graveyard. This could be a monster's effect, a spell card, or even a trap card. Look at the card's text to see what it does.
* Tribute Summoning: To summon certain monsters, you have to tribute (send to the graveyard) other monsters from your field. This is a common way to get rid of your own cards.
* Discarding: Some cards require you to discard cards from your hand. These cards usually go to the graveyard.
* Cost of activating a card: Some cards require you to send a card from your hand or field to the graveyard as a cost to activate them.
* Destruction: If a card is destroyed (by battle or card effects), it goes to the graveyard.
Important Notes:
* You can't always send cards to the graveyard whenever you want. You can only send cards to the graveyard if a specific card effect or rule allows you to.
* Be careful with Trap Cards: Trap cards have effects that activate when certain conditions are met. Make sure you understand the conditions before you try to activate them.
* You can't send your own cards to the graveyard directly by using a Trap card's effect unless the trap card's effect specifically allows it.
For a more detailed explanation:
* Read the card's text carefully! The card text will always tell you exactly what it does.
* Refer to the Yu-Gi-Oh! rulebook: The rulebook has detailed information about all the different ways cards can be sent to the graveyard.
Let me know if you have any more questions about specific card effects or rules!