Burgesstoma Marella
Another important one.
Send 1 Trap Card from your Deck to the Graveyard. When a Trap Card on the field is activated while this card is in your Graveyard: You can Special Summon this card as a Normal Monster (Aqua/WATER/Level 2/ATK 1200/DEF 0). (This card is NOT treated as a Trap Card.) If Summoned this way, this card is unaffected by monster effects, also banish it when it leaves the field.
Another important one.