
Aeronaut Tinkerer | Creature | Human Artificer | Aeronaut Tinkerer has flying as long as you control an artifact. (It can't be blocked except by creatures with flying or reach.) | Willian Murai

Chasm Skulker | Creature | Squid Horror | Whenever you draw a card, put a +1/+1 counter on Chasm Skulker.
When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on Chasm Skulker. (They can't be blocked as long as defending player controls an Island.) | Jack Wang

Coral Barrier | Creature | Wall | Defender (This creature can't attack.)
When Coral Barrier enters the battlefield, create a 1/1 blue Squid creature token with islandwalk. (It can't be blocked as long as defending player controls an Island.) | Florian de Gesincourt

Frost Lynx | Creature | Elemental Cat | When Frost Lynx enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step. | Izzy

Illusory Angel | Creature | Angel Illusion | Cast this spell only if you've cast another spell this turn.
Flying | Allen Williams

Jorubai Murk Lurker | Creature | Leech | Jorubai Murk Lurker gets +1/+1 as long as you control a Swamp.
{1}{B}: Target creature gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.) | Clint Cearley

Wall of Frost | Creature | Wall | Defender
Whenever Wall of Frost blocks a creature, that creature doesn't untap during its controller's next untap step. | Mike Bierek