Eldrazi you control are Slivers in addition to their other types.
Slivers you control have devoid and annihilator 1. : Create a 1/1 colorless Eldrazi Sliver creature token. It has “Sacrifice this creature: Add .”
If a creature is attacking a planeswalker, the planeswalker’s controller is the defending player.
12-11-2019
wotc
If a creature attacks a planeswalker and that planeswalker leaves the battlefield, the creature continues to attack. If it’s blocked, it’ll deal combat damage as normal, but if it’s unblocked, it won’t deal any combat damage.
12-11-2019
wotc
Annihilator 1 means “Whenever this creature attacks, defending player sacrifices a permanent.”
12-11-2019
wotc
Due to the carefully calibrated system of layers that Magic uses to determine the interaction of continuous effects, gaining an ability that changes the color of an object has no effect on the color of that object. Despite this, Slivdrazi Monstrosity causes Slivers to become colorless as they gain devoid. Rather than try to figure out how this could work, this card should just be played as though it read “Slivers you control have devoid and annihilator 1 and are colorless.”
12-11-2019
wotc
Slivdrazi Monstrosity’s ability affects itself, causing it to become colorless and gain devoid and annihilator 1 while it’s on the battlefield. While not on the battlefield, it’s all colors.
12-11-2019
wotc
{C} can be paid only with one colorless mana.
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.