Flash
When Benthalos of Land and Sea enters, you may cast a copy of target white or blue enchantment you control.

Whenever Berry Harvester enters or attacks, create a Berry token.
The first time you would create one or more Berry tokens each turn, create an additional Berry token.

Deathtouch
Whenever a creature you control deals combat damage to an opponent, draw a card. You lose 1 life unless that creature had deathtouch.

Bioengineered Opus enters with three +1/+1 counters, a lifelink counter, and a vigilance counter on it.
When Bioengineered Opus dies, for each creature you control, you may move a counter from Bioengineered Opus onto that creature.

Creatures you control have “{T}: Create a Treasure token.”
{W}{U}{B}{R}{G}, Sacrifice Black-Tie Gala: Draw two cards.

Return target nonland permanent to its owner's hand. Then that player reveals their hand. You choose a nonland card from it. That player discards that card.

When Blackout Grifter enters, each opponent loses 1 life and you gain 1 life.
Cybersoul {3}{B}

Equipped creature gets +1/+2 and has “At the beginning of your end step, put a time counter on Blade of Bright Futures.”
{2}, Sacrifice Blade of Bright Futures: You gain X life and draw X cards, where X is one plus the number of time counters on it. Activate only as a sorcery.
Equip {2}

Equipped creature gets +2/+1 and has “At the beginning of your end step, put a time counter on Blade of Clouded Pasts.”
{2}, Sacrifice Blade of Clouded Pasts: Target player loses X life and discards X cards, where X is one plus the number of time counters on it. Activate only as a sorcery.
Equip {2}

Whenever an attacking creature you control dies, Bleeding Edge Memorial deals 1 damage to defending player.
Spellcharge 4

Enchant creature
Enchanted creature has double strike.

Enchant player
Enchanted player may cast blue spells with mana value less than or equal to their devotion to blue without paying their mana costs.

Enchant creature
Enchanted creature gets +2/+2 and has flying.
Whenever enchanted creature dies, create a 2/2 white Pegasus creature token with flying.

Flash
When Blightfang Zyxthax enters, discard a card. If you do, it gains deathtouch until end of turn.

Flash
When Blind Keelah enters and whenever you cast a spell during an opponent's turn, each opponent loses 1 life and you surveil 1. This ability triggers only once each turn.

Target creature gets +2/+2 until end of turn and must be blocked this turn if able. Untap up to one target creature. It blocks this turn if able.
Surface {4}{G}

Enchant creature
Enchanted creature can't attack or block.

Ward {X}, where X is the number of differently named lands you control.

Flying, haste
When Blistering Cryophoenix enters, discard any number of cards, then draw that many cards.
If a spell you own which had its flashback cost paid would be put into exile, put it into your hand instead.

Whenever Bloom Brute deals combat damage to a player, create two Berry tokens.

Flying
When Blooming Sauropod enters, create two Berry tokens, then sacrifice any number of Berries. For each Berry sacrificed this way, put a +1/+1 counter on another creature you control.

Flying
When Blue Collar Bloodsucker enters, you gain 2 life. Then if you control a red permanent, Blue Collar Bloodsucker deals 2 damage to each opponent.

Choose one. If you control a Weather as you cast this spell, you may choose both instead.
• Put a +1/+1 counter on target creature for each basic land type among lands you control.
• Target creature you control deals damage equal to its power to target creature you don't control.

Choose one. If you control a Weather as you cast this spell, you may choose both instead.
• Creatures you control get +2/+1 until end of turn.
• Boiling Storm deals 2 damage to each creature.

Choose one or both —
• Target creature you control gets +1/+1 until end of turn.
• Create a 1/1 white Human creature token.