What If Hearthstone Cards Were Yugioh Cards 

as a Yugioh player, the only cards you made that are viable in are the harvest golem, alexstraza, and arcane intellect. -Harvest Golem is solid for decks that can abuse token generation, which is basically every deck since link era, the 'sent from field to graveyard' is a decent limiting factor but the non-existence of a 'once per turn' clause is ripe for abuse. -arcane intellect is really good for decks that rely more on spells or traps (for example labyrinth maybe?, sky striker, runick, stun/burn, eldlich, and decks that use trap monsters) but the banish face-down monster from hand is still a heavy cost because most yugioh decks use handtraps (monsters whose effects can be activated from hand, usually used to disrupt opponent during their turn) the way I see it played is to summon your monsters out of your hand first, then use arcane intellect to draw cards, the only heavy cost for this is you don't have handtraps, but decks that would use this (like the decks that I have mentioned before) usually use floodgates or their spells and traps to disrupt your opponent on their turn. decks that abuse the banish mechanic (for example shiranui/zombie and floowandareeze) can't use this because it banishes 'face down', which in yugioh means the banish also negates their effects that usually triggers when they are banished, the only outlier is gran maju or maybe kashtira (don't know if arise heart can snatch banish face down cards). -Alextraza is only viable in ftk decks, players starts the game with 8000 health points, and there are very few cards that can deal 8000 damage to your opponent, but there are a lot more cards that can deal 4000 damage to your opponent, still, the tribute or normal summoning requirement is atrocious. However, I understand that if Alexstraza's monster effect could be activated by special summoning, it would become too powerful/toxic.

Arcane intellect breaks skystriker and kash

It's actually way better as yu gi oh card

Why make Alexstrasza so bad? Even Brick-Eyes is better than her.