As an additional cost to cast this spell, sacrifice a land.
Search your library for a land card, put that card onto the battlefield, then shuffle.

When this creature enters, each player sacrifices a creature of their choice.

Trample
Cycling (, Discard this card: Draw a card.)
When you cycle this card, put two +1/+1 counters on up to one target creature or Vehicle. It gains trample and indestructible until end of turn.

Sacrifice a creature. Return up to X cards from your graveyard to your hand, where X is the number of colors that creature was. Exile this card.

+1: Draw a card, then discard a card.
+1: Target creature gets +2/+0 and gains first strike and trample until end of turn.
−8: Draw four cards. When you do, The Royal Scions deals damage to any target equal to the number of cards in your hand.

, Sacrifice two other creatures: Any number of target players each lose 2 life and sacrifice a creature of their choice. You add and draw a card. (Activate only as an instant.)

Trample
This creature enters tapped.
Cumulative upkeep—Sacrifice a land. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Trample
Whenever one or more creatures you control with trample deal combat damage to a player, create an X/X green Dinosaur Beast creature token with trample, where X is the amount of damage those creatures dealt to that player.

Converge — Search your library for a creature, instant, or sorcery card with mana value less than or equal to the number of colors of mana spent to cast this spell, exile that card, then shuffle. You may cast that card without paying its mana cost.

Devoid (This card has no color.)
Whenever you cast an Eldrazi spell, you may pay . If you do, copy all spells you control, then copy all other activated and triggered abilities you control. You may choose new targets for the copies. (Mana abilities can't be copied.)

, Sacrifice this creature: Choose a creature type. Reveal cards from the top of your library until you reveal a creature card of that type. Put that card onto the battlefield and shuffle the rest into your library.

Other artifact creatures you control get +2/+2.
Whenever this Vehicle attacks, return up to one target artifact card from your graveyard to the battlefield.
Crew 6

Play with the top card of your library revealed.
You may play lands and cast spells from the top of your library.

Whenever equipped creature deals combat damage to a player, destroy all permanents other than this Equipment.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Pack Rat's power and toughness are each equal to the number of Rats you control.
, Discard a card: Create a token that's a copy of this creature.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
Whenever this creature deals damage to a player, that player can't gain life for the rest of the game.

When this creature enters, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")
Whenever another creature you control enters, you gain 1 life.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Flying, deathtouch
When this creature enters, draw a card.