Note that sagas only sacrifice themselves as part of the resolution of their last chapter ability, or if they somehow end up with more counters on them than they have chapter abilities, which very rarely happens and doesnt prevent their chapter abilities from triggering anyway
Necrovalley prevents cards from being able to leave the graveyard, which can completely shut down entire strategies just by just activating it
they often rely on a Feasting Troll King to beat you in combination with Trail of Crumbs
All 215 cards are available as mosaic rares
Even better, Sword of Wealth and Power makes a Treasure token when the equipped creature deals combat damage to a player, and then you get to copy the next spell you cast this turn
TRADING CARD GAME Stainless Steel Card: Dark Magician Girl collectors item, to Speed Duel products for the causal Duelist