Swarm

From Yu-Gi-Oh!

Swarming is the process of rapidly Summoning monsters to your side of the field in an attempt to overwhelm your opponent. "Double Summon", "Ultimate Offering", "Cyber Dragon", "The Tricky", and "Gilasaurus" are examples of cards with swarm capabilities.

Anti-Swarm refers to cards that help to counteract Swarming. "Mirror Force" and "Torrential Tribute" are considered Anti-Swarm cards. Ultimate Tyranno can aid in defeating weak swarm monsters on the field, since it has a "Continous" ability which allows it to attack all monsters on your opponent's side of the field.

Sometimes swarming can lead to overextending.