Other Giant creatures you control get +2/+2 and have trample.

Exile target creature with power 3 or less.

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
Whenever Donna Noble or a creature it's paired with is dealt damage, Donna Noble deals that much damage to target opponent.
Doctor's companion (You can have two commanders if the other is the Doctor.)

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First strike
Whenever a creature dealt damage by this creature this turn dies, you gain life equal to that creature's toughness.

, : Put a +1/+1 counter on target creature.

Whenever this creature deals combat damage to a player, you may destroy target enchantment that player controls.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

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Counter target spell unless its controller pays .
Cycling (, Discard this card: Draw a card.)
When you cycle this card, you may counter target spell unless its controller pays .

When you cast this spell, reveal the top X cards of your library. You may put a nonland permanent card with mana value X or less from among them onto the battlefield. Then shuffle the rest into your library.
This creature enters with X +1/+1 counters on it.

Double strike
When Drizzt enters, create Guenhwyvar, a legendary 4/1 green Cat creature token with trample.
Whenever a creature dies, if it had power greater than Drizzt's power, put a number of +1/+1 counters on Drizzt equal to the difference.

: Untap target land.
: Choose target battle. If an opponent protects it, remove a defense counter from it. Otherwise, put a defense counter on it. Activate only as a sorcery.

Trample
Enchantment spells you cast from your hand have cascade. (Whenever you cast an enchantment spell from your hand, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

As Vorthos, Steward of Myth enters, choose a named Magic character.
Each spell you cast with the chosen character in its name, flavor text, or art costs less to cast. This effect reduces only the amount of colored mana you pay.

Trample
When this creature enters, draw three cards, then discard two cards at random. If two cards that share a card type are discarded this way, put two +1/+1 counters on this creature.

Whenever a creature you control that was turned face up this turn deals combat damage to a player, draw a card.
: Turn target face-down attacking creature you control face up.

Visit — Create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")