What it does
I can't find a real Magic: The Gathering keyword or ability called "Thundaga." That term comes from the Final Fantasy series, where it's a high-tier lightning spell. It isn't an MTG mechanic.
That said, Magic recently released a Final Fantasy Universes Beyond set, so there may be cards referencing Final Fantasy spells like Thundaga as flavor names. But "Thundaga" itself isn't a keyword with defined rules text—any card using that name would have its own printed abilities (likely some form of direct damage, given the source material).
If you saw "Thundaga" on a specific card, check that card's actual rules text rather than treating it as a keyword. If you meant a different ability—like Trample, Threshold, or something similar—let me know and I'll break it down properly.
Iconic cards with Thundaga
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