The first is a triggered ability: "When this permanent enters, target player may search their library for a card named Mothers Yamazaki, reveal it, put it into their hand, then shuffle." The second and third abilities represented by Mothers Yamazaki's "partner with itself" keyword modify the rules for deck construction in the Commander variant and have no function outside of that variant
Lair of the Hydra Everything that I like about Den of the Bugbear is true of Lair of the Hydra, except that green decks will more commonly be interested in activating the card by their nature in the classic Cube environments
I would place -1/-1 counters with other effects as well and turn the Aftermath effect into a board wipe
Great utility card in any creature-heavy deck
Sadly, we dont see many two-type-typal decks because it's kind of difficult to balance them out
Burn is a decidedly red effect, with red cards like Lightning Bolt and Fireball defining reds identity in Magics very first set, Alpha