Zom Blob +7 turn 3.

Hi everybody, I have been trying to understand how some users play Zom blob so fast and with so much Strength, I've seen it twice.

I was Knuckle, my enemy was Super Brainz. 

Turn 1:

I skipped

He drew two cards. (Telepathy Superpower)

Turn 2:

He played a Regifting Zombie (we both got two cards). on heights

I played a Clique Pea in front of Regifting Zombie.

both died in battle.

(The all battle is empty)

Turn 3: 

He played Zom blob with 7/5.  On heights

I thought, wow so tough.

Anyways, i played Pear Cub on heights.

once they fight, my Pear Cub died and Grizzly appear, and that's where I thought, wait, how much does zomb blob cost and why is it 7? wtf

Zom blob had 7/4 (4 because my pear cub did 1 damage to him).

just at the beginning of turn 4, I took the photo, so you tell me what happened and if this is really possible.

there is no nebula, did not play any Cryo brain (in that case he would have received 5 in turn 4).

I thought of a swabbie ( those that cost 0) but still i don't understand the 7. Sugary treat give +3, but cost 2! and also increase +1 the health and that zomb blob don't have 6 of strength, so i don't get it.

he  move his silly zomb blob and play trick of treater, i played more cheaps plants, and the next turn i returned his zomb blob to the heights with Banan peel, and he conceded.