Stickers to consider:

ANY NONLAND

• Cascade
• Convoke
• Deathtouch
• Delve
• Escape MC+3, Exile three cards (?)
• Flash

ANY PERMANENT

• Fabricate 1
• First strike
• Graft 1
• Paradise (T: Add one mana of any color.)
• Ranger (When this permanent enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.)
• Riot

CREATURES ONLY

• Backup 1
• Embalm MC+2
• Evoke MC-3
• Menace
• Prowess
• Squad 3
• Unearth MC

INSTANTS / SORCERIES ONLY

• Cantrip (Draw a card.)
• Casualty 2
• Flashback MC+2
• Jump-start
• Prosper (Create a Treasure token.)
• Support 2