(1) Special Summon 1 Dragon Ruler monster from your hand, GY, or banishment, then, immediately after this effect resolves, you can Xyz Summon 1 Dragon Ruler monster using only Dragon Ruler monsters you control as material
This is colloquially known as downshifting. Some other popular downshifts include Elvish Vanguard, Burning-Tree Emissary, and Fiery Cannonade
Workforce Development Pathway Build Skills
If this spoiler season has you feeling a tad lost, our guide to DnD settings might help reorient you
Promo Info booster GREAT LEGEND [BT-04] CLOSECLOSE BT4-047 U Digimon Lv.6 Rasielmon Color Yellow Form Mega Attribute Vaccine Type Throne DP 10000 Cost 10 Digivolve Cost 1 4 from Lv.5 Digivolve Cost 2 - Upper Text [When Digivolving] Trigger Recovery +2 (Deck)
They could just have set the difficulty of the test in the card text to the right thing to begin with