Siege Elemental’s last ability allows you to ignore only a creature’s tapped status when determining if it can block. It doesn’t allow a creature to block a creature it couldn’t otherwise block.
12-11-2019
wotc
Once a tapped creature has blocked, untapping it won’t cause it to stop blocking.
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.