Tengu format ruling
Wild Nature's Release

Card effect (current official text)Target 1 Beast or Beast-Warrior-Type monster; it gains ATK equal to its current DEF until the End Phase. During the End Phase, destroy it.
Rulings
- When you increase the ATK of a monster with Wild Nature's Release, then apply another modifier, the new modifier is applied to the current ATK points.
- If Ojama Yellow is equipped with Axe of Despair (1000 ATK, 1000 DEF), if Wild Nature's Release is activated then it increases Ojama Yellow to 2000 ATK, 1000 DEF. If Axe of Despair is then destroyed, Ojama Yellow remains 2000 ATK, 1000 DEF.
- If a monster is affected by Wild Nature's Release, and its Type is then changed with DNA Surgery, the effect of Wild Nature's Release is not negated and the monster is still destroyed during the End Phase.
- If you activate multiple Wild Nature's Releases, the effects are cumulative.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.