Check to see if there are two or more instant and/or sorcery cards in your graveyard as the spell resolves to determine whether the spell mastery ability applies
Its ability will continue to affect other Sliver creatures you control.
You all raised some interesting points about how youre tweaking your own decks using the new Brackets System as a guideline, and its got me thinking about how I could adapt my own decks for the other four brackets as well
If a "Frightfur" Fusion Monster(s) you control would be destroyed by battle or card effect, you can banish this card from your GY instead
As a method of redemption, Wizards of the Coast offered to replace sent-in Spanish Worry Beads with Spanish Eye of Ramos cards
20% chance of discarding Ogopogo (-1), summoning Tsuchinoko, drawing a card (+1), then sending a Danger card to GY