The problem with all of these cards is that they no longer function once you run out of Shocktroopers in your deck, hence the Vanilla Pendulums also allow you to use all of these support cards to great effect, since you will have other targets to summon or search once your Shocktroopers have entered the fray
Majestic Dragon X LIGHT Level 1 [ DragonTunerEffect ] ATK 0 DEF 0 Cannot be used as Synchro Material, except for the Synchro Summon of a "Majestic" monster
C Common Armed Dragon LV10 White X LIGHT Level 10 [ DragonEffect ] ATK 3000 DEF 2000 Cannot be Normal Summoned/Set
Detailed rarity guide LINK
If that attack was aimed at another Monster, you can save the bacon, or use it to maintain some of your precious life points but only once per duel
For most other decks, however, theyll be locked out of most of their key resources