Lord of Atlantis

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

Mahamoti Djinn

Flying (This creature can't be blocked except by creatures with flying or reach.)

Whenever a player casts a spell, that player returns a land they control to its owner's hand.

Tap all lands target player controls and that player loses all unspent mana.

Flying
{T}: This creature deals 1 damage to any target.

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

{1}: The next time a red source of your choice would deal damage to you this turn, prevent that damage.