Zivin, Molded of Marrow Legendary Creature - Horror Lifelink Whenever another creature with lifelink enters the battlefield under your control, each opponent loses life equal to its power. , : Return target creature card from your graveyard to the battlefield with a lifelink counter on it. 4/4
Eleanor Abernathy, Crazy Cat Lady gets +1/+1 and can block an additional creature each combat for each nontoken Cat creature you control. Cat creatures you control get +1/+1 and have vigilance. , Tap two untapped Cat creatures you control: Create a 1/1 white Cat creature token with lifelink. : Target Cat creature you control gets +1/+0 and gains flying and deathtouch until end of turn. At the beginning of the next end step, sacrifice that creature.
Funny story. I looked up the rules on colour identity to make certain that colour-setting text is valid, confirmed that it was, added the ability, then forgot that was the challenge. So I went to check, and scrolled too far up. Consequently, this is a card that gets its colour identity from its rules text, and cares about things that are "not".
Linuk, Constructing Construct Legendary Artifact Creature - Construct Linuk can't reduce the cost of spells to less than 1 mana. Instant spells cost less to cast. Sorcery spells cost less to cast. Creature spells cost less to cast. Planeswalker spells cost less to cast. Enchantment spells cost less to cast. Artifact spells cost less to cast. 3/3