Mirkwood Channeler

The scaling clause tells you exactly which deck this was built for: a mono-green or heavily green Elf board where Forest count climbs fast, and a single beginning-of-combat trigger turns a modest attacker into a lethal one. The trample rider is what makes it more than a pump spell on a stick. Elf decks flood the board, and a fat blocker parked in front of one big attacker is the usual way that plan stalls; handing trample to the buffed creature every combat means the extra size gets through rather than getting chumped. Because the trigger fires at the beginning of combat and picks a single Elf, it also rewards sequencing: point it at whatever survived the last turn, or at a creature with a connect-trigger you want to guarantee lands. The ceiling is real in a dedicated Forest-heavy build, where X can outrun any blocker across the table, but the floor is honest too: with few Forests down, this is a 3/3 that hands out a small, situational buff. That gap between floor and ceiling is the design tension, and note the ability targets one creature rather than pumping the team, so this is a spearhead, not an anthem. It sits in the payoff slot of a go-wide green Elf strategy: the card that decides which of your attackers becomes the one that ends the game, not a standalone threat.