Legendary creatures you control get +2/+1 and have ward .
Nonlegendary creatures you control get +1/+1.

Sliver creatures you control have indestructible. (Damage and effects that say "destroy" don't destroy them.)

Flying, vigilance
When Icingdeath, Frost Tyrant dies, create Icingdeath, Frost Tongue, a legendary white Equipment artifact token with "Equipped creature gets +2/+0," "Whenever equipped creature attacks, tap target creature defending player controls," and equip .

Whenever a nonartifact permanent you control enters, you may return another permanent you control that shares a permanent type with it to its owner's hand.

Add for each Goblin on the battlefield.

, , Sacrifice this creature: Each player discards their hand, then draws seven cards.

Haste
Whenever The Regalia attacks, reveal cards from the top of your library until you reveal a land card. Put that card onto the battlefield tapped and the rest on the bottom of your library in a random order.
Crew 1

Whenever a player casts their second spell each turn, you lose 1 life and create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Creature spells can't be countered.

(: Add or .)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

Other Archer creatures you control get +1/+1.
Whenever an Archer you control deals damage to a creature, that Archer deals that much damage to that creature's controller.

Commander creatures you own have "Whenever you cast a spell from exile, this creature deals damage equal to that spell's mana value to target opponent."

Artifact creatures you control have afflict 3. (Whenever a creature with afflict 3 becomes blocked, defending player loses 3 life.)

The Watcher in the Water enters tapped with nine stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Whenever you draw a card during an opponent's turn, create a 1/1 blue Tentacle creature token.
Whenever a Tentacle you control dies, untap up to one target Kraken and put a stun counter on up to one target nonland permanent.

Each creature you control gains vigilance, trample, and melee until end of turn. (Whenever a creature with melee attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
At the beginning of the next main phase this turn, draw a card for each player who was dealt combat damage this turn.

When Urza enters, create a 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control."
Tap an untapped artifact you control: Add .
: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.

When this creature enters, search your library for a creature card with power 2 or less, reveal it, put it into your hand, then shuffle.

: Add .
: Each player gains control of all creatures they own.

Deathtouch
At the beginning of your upkeep, sacrifice The Gitrog Monster unless you sacrifice a land.
You may play an additional land on each of your turns.
Whenever one or more land cards are put into your graveyard from anywhere, draw a card.

: Add one mana of any color in your commander's color identity.