Instant
Lightning Storm
Lightning Storm deals X damage to any target, where X is 3 plus the number of charge counters on Lightning Storm. Discard a land card: Put two charge counters on Lightning Storm. You may choose a new target for it. Any player may activate this ability but only if Lightning Storm is on the stack.
From Magic: The Gathering.
Exact printings
Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6odx049tqppb1hrvmeu8ah.