As Buzzing Whack-a-Doodle enters the battlefield, you and an opponent each secretly choose Whack or Doodle. Then those choices are revealed. If the choices match, Buzzing Whack-a-Doodle has that ability. Otherwise, it has Buzz.
• Whack — : Target player loses 2 life.
• Doodle — : You gain 3 life.
• Buzz — , : Draw a card.

Flying
When Dark Hatchling enters the battlefield, destroy target nonblack creature. It can't be regenerated.

Each player returns all creature cards from their graveyard to their hand.

, : Target creature can't be blocked this turn.
Transmute (, Discard this card: Search your library for a card with the same converted mana cost as this card, reveal it, and put it into your hand. Then shuffle your library. Transmute only as a sorcery.)

Flying
When Hoverguard Sweepers enters the battlefield, you may return up to two target creatures to their owners' hands.

First strike, protection from black borders (Nothing with a black border can block, target, deal damage to, or attach to this creature.)

First strike, protection from black borders (Nothing with a black border can block, target, deal damage to, or attach to this creature.)

First strike, protection from even collector numbers (Nothing with an even collector number can block, target, deal damage to, or attach to this creature.)

First strike, protection from loose lips (Nothing with an open mouth in its artwork can block, target, deal damage to, or attach to this creature.)

First strike, protection from odd collector numbers (Nothing with an odd collector number can block, target, deal damage to, or attach to this creature.)

First strike, protection from two-word names (Nothing with exactly two words in its name can block, target, deal damage to, or attach to this creature. Hyphenated words are one word.)

First strike, protection from watermarks (Nothing with a watermark can block, target, deal damage to, or attach to this creature.)

You may choose not to untap Mana Leech during your untap step.
: Tap target land. It doesn't untap during its controller's untap step for as long as Mana Leech remains tapped.

Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.
Draw a card.

When Riveting Rigger enters the battlefield, you may sacrifice another artifact. If you do, put two +1/+1 counters on Riveting Rigger and it assembles a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)

When Spined Fluke enters the battlefield, sacrifice a creature.
: Regenerate Spined Fluke.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
: Attach Stasis Cell to target creature.

When Trinket Mage enters the battlefield, you may search your library for an artifact card with converted mana cost 1 or less, reveal that card, and put it into your hand. If you do, shuffle your library.