Echo Circlet’s effect is cumulative. If it equips a creature that can already block an additional creature, now it can block three creatures. The same is true if two Echo Circlets equip the same creature, for example.
01-01-2011
wotc
Destroying or unequipping the Echo Circlet after blockers have been declared will not undo any blocks made by the equipped creature.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.