Modos, Combine Destroyer

Partner with Iridhys, Simic Maestro
Trample
When Modos, Combine Destroyer enters play
or attacks, you may pay {x}{x}. If you do, reveal
the top X cards of your library and put +1/+1
counters onto Modos equal to the total mana
value of those cards. Then put one of those
cards into your hand and the rest into your
graveyard.