I am not sure if this is intentional but "its" here refer to "intelligence" not "base intelligence". So buying intelligence items before eating it give you more intelligence. When you see a wyvern dropping items to buy 6 mantles of intelligence, please stay calm.
https://reddit.com/link/1u932ca/video/qmvt12ahp08h1/player
Match id 8853931240 from Watch tab. It is not a bug; PL picker deserved this. The 25% damage amp from Roshan roar aura and 600% damage taken from PL illusions trigger the catalyst 7.25 times from every illusion. Illusions count as heroes for Conjurer's Catalyst. Dire did win this game.
Chasm stone +40 AoE does not work, but Gleipnir and Shiva +75 AoE work. Mystic flare has 170 radius and Aghanim scepter passive cast will be 500 range away. Even with 500 range apart, 2x 245 radius Mystic flare can hit the same target due to bound radius which is 24 for most heroes and 8 for a few heroes (Hood, Lycan, Meepo, Naga, MK, PL) which make it harder to pull this off. Actually, I do not know why naga can be affected by 2 flares because 245+8+245=498<500, but she does in the demo. I figured it out, it is radius so 8 bound radius has 16 diameter and 245+16+245>500.