Cards that look for hexproof ability can't find midified hexproof versions (Kathril, Aspect Warper, Eater of Virtue, etc)

[JayDi85]

Cards that look for hexproof ability can't find midified hexproof versions (Kathril, Aspect Warper, Eater of Virtue, etc)

[github-actions]

Odric, Blood-Cursed - (Gatherer) (Scryfall) (EDHREC)

{1}{R}{W}
Legendary Creature — Vampire Soldier
3/3
When Odric, Blood-Cursed enters the battlefield, create X Blood tokens, where X is the number of abilities from among flying, first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance found among creatures you control. (Count each ability only once.)

Kathril, Aspect Warper - (Gatherer) (Scryfall) (EDHREC)

{2}{W}{B}{G}
Legendary Creature — Nightmare Insect
3/3
When Kathril, Aspect Warper enters the battlefield, put a flying counter on any creature you control if a creature card in your graveyard has flying. Repeat this process for first strike, double strike, deathtouch, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance. Then put a +1/+1 counter on Kathril for each counter put on a creature this way.

Eater of Virtue - (Gatherer) (Scryfall) (EDHREC)

{1}
Legendary Artifact — Equipment
Whenever equipped creature dies, exile it.
Equipped creature gets +2/+0.
As long as a card exiled with Eater of Virtue has flying, equipped creature has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, and vigilance.
Equip {1}

Altar of the Wretched // Wretched Bonemass - (Gatherer) (Scryfall) (EDHREC)

{2}{B}
Artifact
When Altar of the Wretched enters the battlefield, you may sacrifice a nontoken creature. If you do, draw X cards, then mill X cards, where X is that creature's power.
Craft with one or more creatures {2}{B}{B}
{2}{B}: Return Altar of the Wretched from your graveyard to your hand.
🔄
Creature — Skeleton Horror
/
Wretched Bonemass's power and toughness are each equal to the total power of the exiled cards used to craft it.
Wretched Bonemass has flying as long as an exiled card used to craft it has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, and vigilance.

Indominus Rex, Alpha - (Gatherer) (Scryfall) (EDHREC)

{1}{U/B}{U/B}{G}{G}
Legendary Creature — Dinosaur Mutant
6/6
As Indominus Rex, Alpha enters the battlefield, discard any number of creature cards. It enters with a flying counter on it if a card discarded this way has flying. The same is true for first strike, double strike, deathtouch, hexproof, haste, indestructible, lifelink, menace, reach, trample, and vigilance.
When Indominus Rex enters the battlefield, draw a card for each counter on it.

[JayDi85]

Alternative solution for 1 (if possible then it's better):

• move all shared code from HexproofBaseAbility to HexproofAbility;
• delete HexproofBaseAbility;
• make HexproofAbility as parent for all other versions.