Flying Whenever Merfolk Windrobber deals combat damage to a player, that player mills a card. Sacrifice Merfolk Windrobber: Draw a card. Activate only if an opponent has eight or more cards in their graveyard.
Kicker {2}{U} When Roost of Drakes enters, if it was kicked, create a 2/2 blue Drake creature token with flying. Whenever you cast a kicked spell, create a 2/2 blue Drake creature token with flying.
{4}{U}: Seafloor Stalker gets +1/+0 until end of turn and can't be blocked this turn. This ability costs {1} less to activate for each creature in your party.
Look at the top X cards of your library, where X is three plus the number of creatures in your party. Put three of those cards into your hand and the rest on the bottom of your library in a random order.
Tap another untapped Rogue you control: Sure-Footed Infiltrator can't be blocked this turn. Whenever Sure-Footed Infiltrator deals combat damage to a player, draw a card.
"I've yet to discover the ruin that can keep me out."
When Acquisitions Expert enters, target opponent reveals a number of cards from their hand equal to the number of creatures in your party. You choose one of those cards. That player discards that card.
Enchant land When Lithoform Blight enters, draw a card. Enchanted land loses all land types and abilities and has "{T}: Add {C}" and "{T}, Pay 1 life: Add one mana of any color."
Heedless of Nissa's warnings, Nahiri repeated history.
Choose target creature. You lose 2 life. Until end of turn, that creature gains "When this creature dies, return it to the battlefield tapped under its owner's control."
"Those who fail to escape Malakir become part of the city's defense." —Doros, expedition guide
When Mind Carver enters, attach it to target creature you control. Equipped creature gets +1/+0. It gets +3/+1 instead as long as an opponent has eight or more cards in their graveyard. Equip {2}{B}