In an aggressive deck, Palm is an almost guarantee kill against Infect
Yorion has also changed how some players build decks
(2025-11-17) If damage dealt is being divided or assigned among multiple permanents or players, that damage is divided or assigned before any effects modify how much damage would be dealt
If it already has a number of lore counters on it equal to its final chapter number, however, no abilities trigger
Magic has seen at least one cat that has no problem going to the graveyard (remember that Cauldron Familiar that needed to be rebalanced?)
A lot of balance and care goes into choosing the cost of a card, more than I can express here, but looking for similar effects on existing Magic cards can give you an idea of a fair costfor example, a ramp spell that puts two lands into play ought to cost 4 mana, per Explosive Vegetation