All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)
Poisonous 1 causes the player to get just one poison counter when a Sliver deals combat damage to them, no matter how much damage that Sliver dealt.
19-03-2021
wotc
A player with ten or more poison counters loses the game as a state-based action, even if no permanents with poisonous are on the battlefield.
19-03-2021
wotc
If a creature has multiple instances of poisonous, each triggers separately.
01-07-2013
wotc
If the creature type of a Sliver changes so it's no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures.
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.