Commander creatures you own have "At the beginning of your upkeep, exile the top card of your library. This creature gets +X/+0 until end of turn, where X is that card's mana value. You may play that card this turn."

Changeling
Whenever an opponent casts a spell, you may put a +1/+1 counter on this creature.

Sliver creatures you control have "When this creature enters, goad target creature an opponent controls."

Haste
Whenever this creature attacks, goad target creature an opponent controls.

All creatures able to block this creature do so.

All creatures able to block target creature this turn do so.

Kicker
When this creature enters, if it was kicked, all creatures able to block target creature this turn do so.

Goad all creatures your opponents control. Until your next turn, those creatures can't block.

During target player's next turn, creatures that player controls attack you if able.

Land creatures you control have flying.
Whenever a land you control enters, if you control seven or more lands, up to one target land you control becomes a 3/3 Elemental creature with haste. It's still a land.

Landfall — Whenever a land you control enters, you gain 1 life and draw a card.

Enchant creature
Enchanted creature gets +1/+1 and has protection from enchantments. This effect doesn't remove this Aura.
Sacrifice this Aura: Destroy target enchantment.

: Each blocked creature gets +1/+0 and gains trample until end of turn.

This creature attacks each combat if able.

Whenever you cast a red spell, this creature gets +1/+1 until end of turn.
Whenever you cast a green spell, this creature gains forestwalk until end of turn.

Flying
This creature can't have counters put on it.

Whenever a Rat you control becomes blocked, it gets +2/+0 until end of turn.

When this creature dies, each opponent loses 2 life.

Flying
This creature can block only creatures with flying.

Flying
: Regenerate this creature.

Flying
: This creature gets +1/+1 until end of turn.

Whenever you cast an enchantment spell, if you don't control a creature named Keimi, create Keimi, a legendary 3/3 black and green Frog creature token with "Whenever you cast an enchantment spell, each opponent loses 1 life and you gain 1 life."
: Tatsunari and target Frog you control can't be blocked this turn except by creatures with flying or reach.

Equipped creature gets +5/+5.
, Exile Tatsumasa: Create a 5/5 blue Dragon Spirit creature token with flying. Return Tatsumasa to the battlefield under its owner's control when that token dies.
Equip

Landfall — Whenever a land you control enters, you may get two rad counters.
: Put target land card in a graveyard that was milled this turn onto the battlefield under your control tapped.

When Tataru Taru enters, you draw a card and target opponent may draw a card.
Scions' Secretary — Whenever an opponent draws a card, if it isn't that player's turn, create a tapped Treasure token. This ability triggers only once each turn.

When this creature enters, target opponent reveals X cards from their hand, where X is the number of Goblins you control. You choose one of those cards. That player exiles it. If an instant or sorcery card is exiled this way, you may cast it for as long as you control this creature, and mana of any type can be spent to cast that spell.