Tengu format ruling
Ultimate Offering

Card effect (current official text)During your Main Phase or your opponent's Battle Phase: You can pay 500 Life Points; immediately after this effect resolves, Normal Summon/Set 1 monster.
Rulings
- The summon does not happen "immediately after this effect resolves". It can't be negated by "Solemn Judgment".
- You can chain this effect to itself, even if you only have 1 monster in hand.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.