Zendikar Rising

Leyline Tyrant | Creature | Dragon | Flying You don't lose unspent red mana as steps and phases end. When Leyline Tyrant dies, you may pay any amount of {R}. When you do, it deals that much damage to any target. | Chase Stone

Nahiri, Heir of the Ancients | Legendary Planeswalker | Nahiri | +1: Create a 1/1 white Kor Warrior creature token. You may attach an Equipment you control to it. −2: Look at the top six cards of your library. You may reveal a Warrior or Equipment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. −3: Nahiri, Heir of the Ancients deals damage to target creature or planeswalker equal to twice the number of Equipment you control. | Anna Steinbauer

Nissa of Shadowed Boughs | Legendary Planeswalker | Nissa | Landfall — Whenever a land enters the battlefield under your control, put a loyalty counter on Nissa of Shadowed Boughs. +1: Untap target land you control. You may have it become a 3/3 Elemental creature with haste and menace until end of turn. It's still a land. −5: You may put a creature card with mana value less than or equal to the number of lands you control onto the battlefield from your hand or graveyard with two +1/+1 counters on it. | Yongjae Choi

Omnath, Locus of Creation | Legendary Creature | Elemental | When Omnath, Locus of Creation enters the battlefield, draw a card. Landfall — Whenever a land enters the battlefield under your control, you gain 4 life if this is the first time this ability has resolved this turn. If it's the second time, add {R}{G}{W}{U}. If it's the third time, Omnath deals 4 damage to each opponent and each planeswalker you don't control. | Chris Rahn

Lithoform Engine | Legendary Artifact | | {2}, {T}: Copy target activated or triggered ability you control. You may choose new targets for the copy. {3}, {T}: Copy target instant or sorcery spell you control. You may choose new targets for the copy. {4}, {T}: Copy target permanent spell you control. (The copy becomes a token.) | Colin Boyer