Attacking into a white deck with four mana open was always a bad idea, as she could swoop in an exile an attacker thanks to her flash ability
Thrasios, Triton Hero often chills in the command zone until you have infinite mana to feed into its activated ability so you can draw your deck and win with Thassa's Oracle, but you can also exploit the activated ability with cards like Training Grounds and Seedborn Muse
This artifact creature can be a combo-crazy commander with tap and untap artifacts, you can slot it alongside commanders that already do this sort of thing, like Trazyn the Infinite, or you can use it to reuse Agatha's Soul Cauldron
Combine Sylvan Library with Words of War to bash your opponent for six damage a turn
Copper Longlegs There're enough fliers going around that I like the fact that this can both deter them and then pump your board if you have counters floating around
Plus, each Set Booster display comes with a Realms and Relics Box Topper card
