Goblin Flotilla

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) At the beginning of each combat, unless you pay {R}, whenever this creature blocks or becomes blocked by a creature this combat, that creature gains first strike until end of turn.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6ofwc3be47pb1hgocow586.