Use Elspeths other +1 ability to give a creature flying and a buff until the end of the turn
When she does, shell give all of her +1/+1 counters to every legendary creature you control, potentially giving you dozens of +1/+1 counters for a minor investment.
Huge fan of this card, as a control player
You can find non-foil and traditional foil borderless character cards in Magic: The Gathering FINAL FANTASY Play Boosters and Collector Boosters
Seven mana is a big ask, but in combination with Sun Titan, Karmic Guide, Burnished Hart, Solemn Simulacrum and Fetchlands, you can recur your whole board constantly
Etali, Primal Storm Etali, Primal Conqueror // Etali, Primal Sickness Heliod, God of the Sun Heliod, the Radiant // Heliod, the Warped Eclipse Finding and Identifying Cards from The List Cards from The List can be found in Set Boosters, appearing about 25% of the time in the final card slot