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'Defender (This creature can't attack.)
{G}, Sacrifice a Wall: Draw a card.
'This land enters tapped unless you control a Mountain or a Forest.
{T}: Add {R} or {G}.
'This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature...
'Defender, flying Cumulative upkeep—An opponent gains 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost...
'This land enters tapped unless you control a Mountain or a Forest.
{T}: Add {R} or {G}.
'Target player discards two cards. Put up to one land card discarded this way onto the battlefield tapped under your control.
'This land enters tapped unless you control two or more other lands.
{T}: Add {G} or {U}.
'Whenever another Merfolk you control enters, put a +1/+1 counter on target Merfolk you control.
'Defender (This creature can't attack.)
'Defender (This creature can't attack.)
'Defender (This creature can't attack.)
'Defender, flying (This creature can't attack, and it can block creatures with flying.)