Incapsula incident ID: 2101000730157433754-285027644946584143
The Valkyrie is played mainly in angel decks, but it can be played in cleric decks and decks that value lifegain
C Common Armored Bitron X DARK Level 2 [ CyberseEffect ] ATK 500 DEF 0 You can Tribute this card: Special Summon 1 Cyberse monster from your Deck, except "Armored Bitron", but negate its effects, also you cannot Special Summon for the rest of this turn, except Cyberse monsters
She is also hard to kill with damage
As actual playable cards, Slifer and Obelisk are great to use with Obelisk's effect allowing you to destroy all monsters the opponent controls if you tribute two monsters while Slifer gains 1000ATK points for every card you have in your hand so with a drawing strategy in mind, you could potentially give Slifer enough attack power to end the duel in one hit
While just throwing a load of random cards together isnt likely to yield great results, part of the fun of Yu-Gi-Oh