Command Tower

{T}: Add one mana of any color in your commander's color identity.

Swamp

Forest

Reliquary Tower

You have no maximum hand size.
{T}: Add {C}.

Island

Indominus Rex, Alpha

As Indominus Rex, Alpha enters, discard any number of creature cards. It enters with a flying counter on it if a card discarded this way has flying. The same is true for first strike, double strike, deathtouch, hexproof, haste, indestructible, lifelink, menace, reach, trample, and vigilance.
When Indominus Rex enters, draw a card for each counter on it.