charizard pokemon card hp 220 Charizard V (Secret) This M Charizard Charizard V Pokemon Gold Metal

What matters is spending one mana to their three or more

Dagsson's ability doesn't care whether or not the creature is actually sacrificed, only that the ability resolves with a legal target, and there's nothing at all illegal about targeting a creature that can't be sacrificed

Once a dungeon is in play, you move through its rooms one at a time following the arrow path that connects the rooms

You can build powerful decks around this approach, using the idea of cycling, digging or searching through your deck with e.g

I fail to cut overly weak pet cards because I love them (Ojutai Exemplars was in my cube for years without ever being put in a deck)