: Add . If you control an Urza's Mine and an Urza's Tower, add instead.

Flying
Whenever you cast a noncreature spell, this creature gets +1/+0 until end of turn.

Flying, haste
At the beginning of combat on your turn, up to two target creatures you control each get +1/+0 until end of turn.

You may pay rather than pay this spell's mana cost.
If the cost was paid, you draw three cards, then an opponent creates two Treasure tokens and they scry 2. If that cost wasn't paid, you draw X cards.

This land enters tapped.
: Add or .

This spell costs less to cast, where X is the greatest power among creatures you control.
Trample

, : Draw a card, then discard a card.

As an additional cost to cast this spell, return a permanent you control to its owner's hand.
Counter target spell.

(: Add .)

, Sacrifice a creature: You gain 1 life.

Trample
When this creature enters, create a 5/5 green Wurm creature token with trample.

Return target creature to its owner's hand.
Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

: Prevent the next 1 damage that would be dealt to any target this turn.

Whenever another nontoken creature you control enters, bolster 1. (Choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)

Defender (This creature can't attack.)
As long as you control a creature with power 4 or greater, this creature can attack as though it didn't have defender.

Destroy target artifact, enchantment, or creature with flying.

All Sliver creatures get +2/+0.

Whenever this creature attacks, it gets +0/+3 until end of turn.

At the beginning of combat on your turn, put a +1/+1 counter on target creature.
Whenever this creature attacks while saddled, double the number of +1/+1 counters on target creature.
Saddle 2 (Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Whenever a creature enters this turn, you may draw a card.
Fuse (You may cast one or both halves of this card from your hand.)