Ichneumon Druid

Whenever an opponent casts an instant spell other than the first instant spell that player casts each turn, Ichneumon Druid deals 4 damage to that player.

Ivory Guardians

Protection from red
Creatures named Ivory Guardians get +1/+1 as long as an opponent controls a nontoken red permanent.

Aerathi Berserker

Rampage 3 (Whenever this creature becomes blocked, it gets +3/+3 until end of turn for each creature blocking it beyond the first.)

Syphon Soul

Syphon Soul deals 2 damage to each other player. You gain life equal to the damage dealt this way.

Cat Warriors

Forestwalk (This creature can’t be blocked as long as defending player controls a Forest.)

Forethought Amulet

At the beginning of your upkeep, sacrifice Forethought Amulet unless you pay .
If an instant or sorcery source would deal 3 or more damage to you, it deals 2 damage to you instead.

Elven Riders

Elven Riders can’t be blocked except by Walls and/or creatures with flying.

Segovian Leviathan

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Lord of Atlantis

Other Merfolk get +1/+1 and have islandwalk. (They can’t be blocked as long as defending player controls an Island.)

Shivan Dragon

Flying (This creature can’t be blocked except by creatures with flying or reach.)
: Shivan Dragon gets +1/+0 until end of turn.

Timber Wolves

Banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s being blocked by or is blocking.)

Mesa Pegasus

Flying; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s being blocked by or is blocking.)

Shivan Dragon

Flying (This creature can’t be blocked except by creatures with flying or reach.)
: Shivan Dragon gets +1/+0 until end of turn.

Mesa Pegasus

Flying; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s being blocked by or is blocking.)

Nightmare

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Nightmare’s power and toughness are each equal to the number of Swamps you control.

Nightmare

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Nightmare’s power and toughness are each equal to the number of Swamps you control.

Holy Armor

Enchant creature
Enchanted creature gets +0/+2.
: Enchanted creature gets +0/+1 until end of turn.

Holy Armor

Enchant creature
Enchanted creature gets +0/+2.
: Enchanted creature gets +0/+1 until end of turn.

Timber Wolves

Banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s being blocked by or is blocking.)

Lord of Atlantis

Other Merfolk get +1/+1 and have islandwalk. (They can’t be blocked as long as defending player controls an Island.)

Holy Armor

Enchant creature
Enchanted creature gets +0/+2.
: Enchanted creature gets +0/+1 until end of turn.

Nightmare

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Nightmare’s power and toughness are each equal to the number of Swamps you control.

Lord of Atlantis

Other Merfolk get +1/+1 and have islandwalk. (They can’t be blocked as long as defending player controls an Island.)