What it does
I'm not familiar with "Leap Strike" as an official Magic: The Gathering keyword or ability—it doesn't appear in the comprehensive rules or any released set. It's possible you're thinking of a similarly named ability, a custom/homebrew card, or a mechanic from another game.
The two real keywords it might be confused with are First Strike (deals combat damage before creatures without it, often killing them before they hit back) and Flying (can only be blocked by creatures with flying or reach). There's also no "leap" keyword, though some cards grant temporary flying or evasion that players sometimes describe informally as "leaping" over blockers.
If you can point me to the specific card or source where you saw "Leap Strike," I'll gladly explain exactly how it works and its Commander implications. Otherwise, double-check the card's printed text—the real keyword is likely first strike or flying.
Iconic cards with Leap Strike
See all 1 →