You gain X life, then look at the top X cards of your library, where X is the greatest mana value among permanents you control. Reveal up to two creature, enchantment, and/or land cards from among them and put them into your hand. Put the rest on the bottom in a random order.

Devoid
Return up to one target colorless permanent card from your graveyard to your hand.
Coalesce {4}{G}

Flying
Surface {2}{B}{B}. This spell costs {1}{B}{B} less if you control a creature named Relentless Bats.
A deck can have any number of cards named Relentless Bats.

Relentless Busker can't block.
{VP}{VP}{VP}: Return Relentless Busker from your graveyard to the battlefield.

Lifelink
Relentless Whisper can't block.
Escape—{4}{B}, Exile four other cards from your graveyard.
Relentless Whisper escapes with a +1/+1 counter on it.

Flash
Enchant creature or artifact
Enchanted permanent loses all abilities and doesn't untap during its controller's untap step.

At the beginning of your upkeep, you may exile target creature if it has a -1/-1 counter on it.

Replicated Regiment enters with a +1/+1 counter and a vigilance counter on it.
At the beginning of your upkeep, you may move a counter from Replicated Regiment onto another creature.

Reach
Replicrawler gets +1/+1 for each other artifact creature you control.
If you would create a token, you may pay {B}. If you do, create a token that's a copy of Replicrawler instead.

When Research Grant enters, look at the top three cards of your library. Put one into your hand and the rest into your graveyard.
You've cast two or more spells this turn.
You've drawn two or more cards this turn.

Flying
Exalted

At the beginning of combat on your turn, you may pay {1}. If you do, create a 1/1 red and green Elemental creature token. It gains haste. Sacrifice it at end of combat.

Defender, flying
{2}{W}{W}: Resplendent Guardian can attack this turn as though it didn't have defender.

Target nonland permanent phases out.
Draw a card.

Whenever one or more lands you control become a creature, distribute two +1/+1 counters among one or two lands you control.
{4}{G}: Target land you control becomes a 4/4 green Elemental creature until end of turn.

Choose one —
• Destroy target artifact.
• Destroy target enchantment.
• Exile target card from a graveyard.

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

You gain 3 life. Draw a card.

Exile target artifact or enchantment.

Once each turn, when a creature with power 2 or less you control enters, you may pay {1}. If you do, draw a card.
{1}{W}: Level 2
At the beginning of combat on your turn, put a +1/+1 counter on up to one target creature you control.
{3}{W}: Level 3
When this Class becomes level 3, exile target nonland permanent an opponent controls until this Class leaves the battlefield.

When Revolutionary Supplier enters, you may search your library for a card named Explosive Canister and/or a card named Fencer's Foil, reveal them, put them into your hand, then shuffle.
The first artifact spell you cast each turn costs {1} less to cast.

When Revved Robo enters, you may put a +1/+1 counter on it. If you don't, it gets +2/+0 and gains haste until end of turn.

Return target creature to its owner's hand. If it was tapped or had accomplice, scry 2.

First strike, vigilance
Ward—Tap an untapped creature you control.

Tap target creature. It can't become untapped for as long as you control a creature named Tidewake Walker.