(Sacrifice, discard, draw)
Its exactly the same effect as blink, (named for the Time Spiral card Momentary Blink (although Momentary Blink only targeted Creatures, while Flicker hit nontoken permanents
Not only does it add a +1/+1 counter to your creatures that deal combat damage to a player, synergizing nicely with Tidus, but it also gives all creatures you control with counters trample and reach, which are powerful abilities
A 1/1 Servo for two mana is fine, and being able to replace it with a 1/1 flying Thopter for one more mana is also just okay
For example, I try to emphasize the fluffiness of a Pokmons fur or the firmness of their muscles
Dont discount the idea of playing Silkguard for X=0 just to protect your Auras and Equipmentplus creatures that are already modified