Once per turn, during either player's turn: If a monster effect is activated on the field or the Graveyard
The point is to make the best list, period
Team Aqua?' You can see the business decision there
Silent Dooms secret rare can only be found in Gladiator Assault from the Yu-Gi-Oh
C Common Tearlaments Scream X SPELL Continuous If a monster(s) is Normal or Special Summoned, and you control a "Tearlaments" monster or "Visas Starfrost" (except during the Damage Step): You can send the top 3 cards of your Deck to the GY, also, for the rest of this turn, all monsters your opponent controls lose 500 ATK
It's been a long time since I've seen a Trap monster, but since the last sentence suppresses development, I'd like to assume that it's basically used during the opponent's turn