Updating backrow on a mac
============================ The Worms Light / Reptile / Level 4 / 1800 ATK / 1000 DEF When this card is Normal Summoned, you can send 1 Reptile-Type "Worm" monster from your Deck to the Graveyard.
If you control a face-up "Worm Yagan", this card can not be destroyed as a result of battle.
Change all face-down monsters on the field to face-up Defense Position.
This is the card that most opponents will have to read before scooping up their cards in disbelief.
You can only use the effect of "Evilswarm Thunderbird" once per turn.
Being able to 'jump' in response to traps and other effects like Bear, Priestess, Big Eye, etc. Worms typically suffer from being able to keep field presence once your traps fail (which will happen much more often due to the popularity of Heavy, MST, Lance, Pandemic, Wisdom, Decree, EEV, etc.); Thunderbird remedies this by giving you a floating level 4 beater bigger than every normal-summoned threat besides War Wolf, and by keeping rank 4 plays open to you at all times. During your Main Phase 1, if this card was Normal Summoned this turn: You can Tribute this card; draw 2 cards, then it becomes the End Phase of this turn.
Extremely versatile, and gets around Decree and EEV.
However unlike most defensive traps the deck chooses to run, using book defensively to flip a monster facedown in order to prevent an effect, attack, or xyz/synchro play, you don't permanently deal with a threat, and you inherently lose card advantage.
and being able to stop continuous effects like Royal Decree, Skill Drain, Messenger of Peace, etc.