Yes, you can attack with a creature that has zero power. The effect only lasts for the attacking player’s turn.

Can you attack with multiple creatures?

You cannot attack creatures directly, only players or planes walkers. After you attack and all players pass priority, the defending player declares blocks. After blocks are declared you decide which creatures are damaged first.

Can non creatures attack?

If their devotion is not high enough, then the god is not a creature, and you cannot attack with a noncreature permanent. In your example, since Thassa is not a creature, you cannot attack with it.

Can you attack multiple opponents in MTG?

You can attack two players. You can block over multiple opponents’ turns.

Can a monster with 0 Attack Attack directly?

Not true. Monsters with 0 ATK cannot destroy anything by battle, and as such if 2 monsters with 0 ATK battle neither are destroyed.

Can you attack creatures directly?

You cannot attack with one creature, and then attack with more later in the turn). Creatures attack your opponent; they do not attack other creatures. Instead, it’s up to the defending player to decide whether or not any of his or her creatures will block.

Can you target a creature in Magic?

A target is a chosen recipient of the effects of a spell or ability. A spell can require you to target a creature, for instance.

Can you directly attack a creature in Magic?

Attacking and Blocking (Your attack happens all at once. You cannot attack with one creature, and then attack with more later in the turn). Creatures attack your opponent; they do not attack other creatures. Instead, it’s up to the defending player to decide whether or not any of his or her creatures will block.

What happens if you neither attack or block a creature?

Even if your opponent does not, you’ve traded damage, but you’re behind in the race. One way to think of things is that creatures provide value every turn that they attack or block. If you neither attack nor block with Wetland Sambar, then you’ve wasted a turn’s worth of its value.

What happens if you don’t put your creatures into combat?

The value of your creatures plummets if you’re unwilling to put them into combat. A classic example comes up when your opponent attacks a morph creature into your Archers’ Parapet. The morph could turn face up to be a 5-power creature, or the opponent could have a spell like Awaken the Bear in his or her hand.

Do you turn creatures sideways before declaring attackers?

Players commonly rush into combat by simply turning creatures sideways to indicate they’re ready to declare attackers. In reality, there is a whole step of combat before you declare attackers, called the “Beginning of combat step.” You always get a chance to do stuff at that point before your opponent can declare attackers.

Can a 2 / 2 creature block a 7 / 7 green creature?

This means that a 2/2 creature with protection from green that is blocking a 7/7 green creature with trample only has to have 2 damage assigned to it, and the other 5 can go right to the player. You ignore the fact that 2 damage will be prevented due to protection, because you’ve already met the “lethal damage” requirement.