Breaker of Armies

Forced-block effects have lived in Magic since Lure: tell every able creature to throw itself in front of one attacker, and the defender's line collapses onto a target that was never the threat. The Eldrazi twist is that the compulsion is welded directly onto a body and costs no green to deploy, so the effect arrives colorless and self-contained rather than as an aura you have to stick on a creature first. The transaction is one-sided when the battlefield is wide: every creature that can legally block this one must, which pulls the defender's front rank onto a single attacker and lets any other attackers hit whatever those forced blockers leave uncovered. The 10 power reads like a finisher, but it is almost incidental to what you are buying. The payoff is the tax on how the defender assigns blocks, not the damage the Eldrazi itself deals. Note the limits: creatures that cannot legally block it (a tapped creature, or one restricted by a menace-style effect, for instance) are exempt, and they remain free to block other attackers instead. And with no deathtouch and no trample, the beater does not shred the wall it draws in; it kills at most what its power can absorb, then dies to the rest if the block is big enough. What eight mana buys is a redirected combat step, a way to make the opponent's defense guard the wrong lane while the real damage lands elsewhere.