Does creating tokens count as casting a spell?

No. No you are not casting spells, you’re creating tokens, that doesn’t count. You’ll only get one Beast token from Terastodon itself, if you cast it.

What counts as casting a spell in magic?

To cast a spell is to take it from where it is (usually the hand), put it on the stack, and pay its costs, so that it will eventually resolve and have its effect. Casting a spell includes proposal of the spell (rules 601.2a–d) and determination and payment of costs (rules 601.2f–h).

Do tokens count as creatures magic?

Re: Do tokens count as creatures entering the battlefield Yup. Tokens behave just like regular creatures in every way, except that they cease to exist when they leave play.

Does creating a token count as entering the battlefield?

Yes, the enter-the-battlefield ability will trigger. 701.6a To create one or more tokens with certain characteristics, put the specified number of tokens with the specified characteristics onto the battlefield. When a token is created, it enters the battlefield.

Can you sacrifice a token creature?

Creature tokens count as creatures in every way; You can sacrifice and exile them to pay costs normally.

When a spell is countered Is it still cast?

Yes. A player doesn’t have a chance to cast a counterspell until after you have finished “casting” your spell, and any “when cast” triggers are triggered and put on the stack. At that point, a player could counter your spell, but the triggered ability is still there as a completely separate thing.

Do tokens have summoning sickness?

You said it’s an instant that creates tokens. If the spell is cast anytime before that player’s turn, then when it becomes that player’s turn, since the tokens have been under his or her control since the beginning of the turn, they do not suffer summoning sickness.