With Gisa on the field, your zombies will be more powerful, and the menace ability makes them much more of a headache to block
Dionus, Elvish Archdruid Elf decks go wide and small, requiring buffs to cross the finish line
You have to be well versed in the current metagame and have a working knowledge of what deck archetypes you're likely going to face
Drawing a Mox early gives a player an early mana advantage over their opponent and mana advantages often win in M:TG
The kind of graveyard or spellslinger decks that wants this can usually sac it right away anyway
Ishkanah, Grafwidow 4G Legendary Creature Spider 3/5 Reach Delirium When Ishkanah, Grafwidow enters the battlefield, if there are four or more card types among cards in your graveyard, put three 1/2 green Spider creature tokens with reach onto the battlefield