The First Sliver Finish:Foil You may put a Dragon

You may put a Dragon creature card from among them onto the battlefield

if the amount of mana spent to cast it was less than its mana value

Whenever you cast an instant or sorcery spell or activate an ability

Put target creature or enchantment card from an opponent’s graveyard onto the battlefield under your control

Create a token that's a copy of it

The First Sliver Finish:Foil You may put a DragonCascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) Sliver spells you cast have cascade.