mtg cards like vanquisher's banner (Card) Creatures you control of the chosen type get +1/+1 Most Valuable Reprints In Commander

See the Unwritten is great in that style of deck

But at only 4 Willpower on her, you are unlikely to have Sisu survive more than a turn

Error cards can include the following

Pumping your teams base power works wonders with counters and other augments, but making small creatures big can drop unexpected damage

NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G NM EX VG G

The deck could also stand to lose land, and we'll pick Terramorphic Expanse since the deck already has Evolving Wilds as well as several other crack lands