When Howler Sellout enters, for each creature that died this turn, post a bounty on up to one target creature an opponent controls. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)
When Howler Sheriff enters, gain control of up to one target creature with a bounty counter on it until end of turn. Untap that creature. It gains haste until end of turn.
Flying Nonland permanents your opponents control enter tapped. Activated abilities of permanents your opponents control that entered this turn can't be activated unless they're mana abilities.
Injustice deals 4 damage to target creature. Post a bounty on up to one other target creature. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)
Noncreature spells your opponents cast cost {1} more to cast for each counter on Judges of Bearidge. {5}{W}{U}: Put a +1/+1 counter on Judges of Bearidge, then detain each creature with lesser power. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)
Play with the top card of your library revealed. You may cast creature spells from the top of your library. You may cast Centaur spells this way without paying their mana costs.
“Every bit of land's got something that'll scare of its investors. The trick is to find it first, and failing that, invent something even worse.” —Lexie Boggs, aether baron
Whenever a non-Spirit creature you control dies, you may create a token that's a copy of that creature except the token is a Spirit in addition to its other types and has haste.
“You've got a second chance. Don't waste it.” — Creed, of Graygulch