[RD/KP03] Long Shield Gardna

I guess this is support for Legend cards?

RD/KP03-JP037 ロング・シールド・ガードナー Long Shield Gardna
Level 5 EARTH Warrior-Type Effect Monster
ATK 1500
DEF 1200
[Requirement] You can activate by changing this card’s battle position (From Attack Position to face-up Defense Position OR From Defense Position to face-up Attack Position)
[Effect] Choose 1 face-up Normal Monster (2000 DEF or more) you control. During this turn, that monster gains 500 ATK, and cannot be destroyed by the effects of your opponent’s Trap Cards.

Source