When this creature dies, if it had a +1/+1 counter on it, draw a card.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Equipped creature gets +1/+0.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Whenever a player casts a blue spell, you may gain 1 life.

Morbid — When this creature enters, if a creature died this turn, return a creature card at random from your graveyard to your hand.

Switch target creature's power and toughness until end of turn.
Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Target creature gets +3/+3 and gains flying until end of turn. (It can't be blocked except by creatures with flying or reach.)

When this creature enters, mill four cards.

Shroud (This creature can't be the target of spells or abilities.)
Threshold — This creature gets +2/+2 as long as there are seven or more cards in your graveyard.

First strike
During your turn, creature tokens you control get +1/+0 and have first strike.
: Create a 1/1 colorless Phyrexian Mite artifact creature token with toxic 1 and "This token can't block." (Players dealt combat damage by it also get a poison counter. can be paid with either or 2 life.)

Flying
Whenever a creature with flying dies, put a +1/+1 counter on this creature.

Other Elf creatures you control get +1/+1.
: Add for each Elf you control.

Counter target creature spell. Essence Backlash deals damage equal to that spell's power to its controller.

Target creature has base power and toughness 5/5 until end of turn. The Ring tempts you.

If three or more creatures are attacking, you may pay rather than pay this spell's mana cost.
Attacking creatures get -3/-0 until end of turn.

When this creature enters, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")

First Contact — Whenever Overseer of Vault 76 or another creature you control with power 3 or less enters, put a quest counter on Overseer of Vault 76.
At the beginning of combat on your turn, you may remove three quest counters from among permanents you control. When you do, put a +1/+1 counter on each creature you control and they gain vigilance until end of turn.

Job select (When this Equipment enters, create a 1/1 colorless Hero creature token, then attach this to it.)
Equipped creature gets +1/+0, has "Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent," and is a Wizard in addition to its other types.
Equip

This land enters tapped.
: Add , , or .