* Ra's Power Depends on Tribute: Winged Dragon of Ra's power is determined by the number of tributes you offer. With 3 tributes, it's incredibly powerful, but if you can't offer the required tributes, it's unusable.
* Vulnerability to Removal: Ra is a powerful monster, but it's vulnerable to card effects that destroy or banish monsters, or negate their effects.
* Meta-Dependent: The "strongest" card in Yu-Gi-Oh! depends heavily on the current meta and what cards are popular.
Here are some cards that can be considered strong against Winged Dragon of Ra:
* Cards that negate effects: Cards like "Solemn Judgment," "Solemn Warning," "Torrential Tribute," and "Call of the Haunted" can negate Ra's effects or destroy it before it can be summoned.
* Cards that banish monsters: Cards like "Dimensional Fissure" and "Mirror Force" can banish Ra from the field, preventing it from being used.
* Cards that remove tributes: Cards like "Swords of Revealing Light" and "Chain Disruption" can prevent you from tributing monsters for Ra.
Ultimately, the strength of any card, including Winged Dragon of Ra, depends on the context of the duel and the strategy you're employing.